ON388 - TABLE B

GRID IDENTIFICATION
(PDS Octet 7)
MASTER LIST OF NCEP STORAGE GRIDS
GRIB Edition 1 (FM92)


Revised 10/28/2014
Red text depicts changes made since 04/16/2012


VALUE GRID GRID INCREMENT GRID
Image
1 1679-point (73x23) Mercator grid with (1,1) at (0W,48.09S), (73,23) at (0W,48.09N); I increasing eastward, Equator at J=12.
See GRIB Specifications
5 degs of Longitude GIF
PS
2 10512-point (144x73) global longitude-latitude grid. (1,1) at (0E, 90N), matrix layout. N.B.: prime meridian not duplicated. 2.5 deg GIF PS
3 65160-point (360x181) global longitude-latitude grid. (1,1) at (0E, 90N), matrix layout. N.B.: prime meridian not duplicated.
See GRIB Specifications
1.0 deg GIF PS
4 259920-point (720x361) global Lon/Lat grid. (1,1) at (0E, 90N); matrix layout; prime meridian not duplicated 0.5 deg GIF PS
5 3021-point (53x57) N. Hemisphere Polar Stereographic grid oriented 105W; Pole at (27,49). (LFM analysis) 190.5 km at 60N GIF PS
6 2385-point (53x45) N. Hemisphere Polar Stereographic grid oriented 105W; Pole at (27,49). (LFM Forecast) 190.5 km at 60N GIF PS
8 5104-point (116x44) Mercator grid with (1.1) at (3.1035E,48.67S) and (116,44) At (0.000W,61.05N); I increasing eastward, Equator at j=19. 3.105 degs of longitude GIF PS
10
25020-point (180x139) longitude-latitude ocean grid with (1,1) at (1E,64N), (180,139) at (1W,74S); I increasing eastward, Equator at J=65
See GRIB Specifications
2 degs of Lon and 1 deg of Lat

11
Global 0.5 degree Latitude/Longitude grid
(Used by Global Multi-Grid Wave Model) See GRIB Specifications
0.5 degree

12
0.167 degree Latitude/Longitude grid - US East Coast
(Used by Global Multi-Grid Wave Model) See GRIB Specifications
0.167 degree

13
0.167 degree Latitude/Longitude grid - US West Coast
(Used by Global Multi-Grid Wave Model) See GRIB Specifications
0.167 degree

14
0.167 degree Latitude/Longitude grid
US Eastern Pacific - includes Hawaii and extends to the Pacific islands of Guam
(Used by Global Multi-Grid Wave Model) See GRIB Specifications
0.167 degree

15
0.250x0.167 degree Latitude/Longitude grid - Alaska
(Used by Global Multi-Grid Wave Model) See GRIB Specifications
0.25 degree Lat and 0.167 degree Lon

16
0.133x0.067 degree Latitude/Longitude grid - Alaska
(Used by Global Multi-Grid Wave Model) See GRIB Specifications
0.133 degree Lat and 0.067 degree Lon

17
0.067 degree Latitude/Longitude grid - US West Coast (includes Hawaii)
(Used by Global Multi-Grid Wave Model) See GRIB Specifications
0.067 degree

18
0.067 degree Latitude/Longitude grid - US East Coast
(Used by Global Multi-Grid Wave Model) See GRIB Specifications
0.067 degree

21-26 International Exchange and Family of Services (FOS) grids.
See GRIB Specifications



27 4225-point (65x65) N. Hemisphere Polar Stereographic grid oriented 80W; Pole at (33,33). 381 km at 60N GIF PS
28 4225-point (65x65) S. Hemisphere Polar Stereographic grid oriented 280E ( 80W ); Pole at (33,33). 381 km at 60S GIF PS
29 5365-point (145x37) N. Hemisphere longitude/latitude grid for latitudes 0N to 90N; (1,1) at (0E,0N). 2.5 degs GIF PS
30 5365-point (145x37) S. Hemisphere longitude/latitude grid for latitudes 90S to 0S; (1,1) at (0E,90S). 2.5 degs GIF PS
33 8326-point (181x46) N. Hemisphere longitude/latitude grid for latitudes 0N to 90N; (1,1) at (0E,0N). 2 degs GIF PS
34 8326-point (181x46) S. Hemisphere longitude/latitude grid for latitudes 90S to 0S; (1,1) at (0E,90S). 2 degs GIF PS
37-44 Eight Lat-Lon 1.25x1.25 "thinned" grids, covering the globe by octants of 3447 points. For WAFS, ICAO, Family of Services (FOS), and International exchange.
See GRIB Specifications



45 Global latitude/longitude 1.25 deg Resolution.
See GRIB Specifications

GIF PS
50 Family of Services "regional grid".
See GRIB Specifications



53 5967-point (117x51) Mercator grid with (1,1) at (0.000W,61.05S) and (117,51) At (0.000W,61.05N); I increasing eastward, Equator at j=26. 3.105 degs of longitude GIF PS
55 6177-point (87x71) N. Hemisphere Polar Stereographic grid oriented 105W; Pole at (44,38). (2/3 bedient NH sfc anl) 254 km at 60N GIF PS
56 6177-point (87x71) N. Hemisphere Polar Stereographic grid oriented 105W; Pole at (40,73). (1/3 bedient NA sfc anl) 127 km at 60N GIF PS
61-64 International Exchange & FOS grids.
See GRIB Specifications



75 12321-point (111x111) N. Hemisphere Lambert Conformal grid. No fixed location; used by QLM Hurricane model. 40 km at 30&60 deg N

76 12321-point (111x111) S. Hemisphere Lambert Conformal grid. No fixed location; used by QLM Hurricane model. 40 km at 30&60 deg S

77 12321-point (111x111) N. Hemisphere Mercator grid. No fixed location; used by QLM Hurricane model. 40 km at 22.5 deg N&S

83 Arakawa semi-staggered A-grid on rotate Latitude/Longitude grid
(used by 13km Rapid Refresh)
See GRIB Specifications
13 km

85 32400-point (360x90) N. Hemisphere longitude/latitude grid; longitudes: 0.5E to 359.5E (0.5W); latitudes: 0.5N to 89.5N; origin (1,1) at (0.5E,0.5N) 1 deg GIF PS
86 32400-point (360x90) S. Hemisphere longitude/latitude grid; longitudes: 0.5E to 359.5E (0.5W); latitudes: 89.5S to 0.5S; origin (1,1) at (0.5E,89.5S) 1 deg GIF PS
87 5022 point (81x62) N. Hemisphere Polar Stereographic grid oriented at 105W. Pole at (31.91, 112.53) Used for RUC. (60 km at 40N).
See GRIB Specifications
68.153 km at 60N GIF PS
88 317840 point (580x548) N. American Polar Stereographic grid oriented at 105W. Pole at (260.853, 613.176) Used for RSAS. (15 km at 60N).
See GRIB Specifications
15 km at 60N GIF PS
90 11807617-point (4289x2753) Grid Over CONUS - Lambert Conformal
(Used by RTMA output for quadruple-resolution NDFD grid)
See GRIB Specifications
1.27 km

91 1822145-point (1649x1105) Grid Over Alaska - Polar Stereographic
(Used by RTMA and NAM smartinit for double-resoulution NDFD grids)
See GRIB Specifications
2.976 km

92 7283073-point (3297x2209) Grid Over Alaska - Polar Stereographic
(Used by RTMA and NAM smartinit for quadruple-resoulution NDFD grids)
See GRIB Specifications
1.488 km

93 111723-point (223x501) Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Alaska).
See GRIB Specifications



94 Staggered B-grid on rotated latitude/longitude grid (NAM Alaska 6km nest)
See GRIB Specifications
6.0 km

95 Staggered E-grid on rotated latitude/longitude grid (NAM Puert Rico 3km nest)
See GRIB Specifications
3.0 km

96 Staggered B-grid on rotated latitude/longitude grid (NAM Hawaii 3km nest)
See GRIB Specifications
3.0 km

97 Staggered B-grid on rotated latitude/longitude grid (NAM CONUS 4km nest)
See GRIB Specifications
4.0 km

98 Global Gaussian T62 grid.
See GRIB Specifications



99 779385-point (669x1165) Arakawa staggered E-grid on rotated latitude/longitude grid (Used by the 12km NAM Model - expanded domain).
See GRIB Specifications



100 6889-point (83x83) N. Hemisphere Polar Stereographic grid oriented 105W; Pole at (40.5,88.5). (NGM Original C-Grid) 91.452 km at 60N GIF PS
101 10283-point (113x91) N. Hemisphere Polar Stereographic grid oriented 105W; Pole at (58.5,92.5). (NGM "Big C-Grid") 91.452 km at 60N GIF PS
103 3640-point (65x56) N. Hemisphere Polar Stereographic grid oriented 105W; Pole at (25.5,84.5) (used by ARL) 91.452 km at 60N GIF PS
104 16170-point (147x110) N. Hemisphere Polar Stereographic grid oriented 105W; pole at (75.5,109.5). (NGM Super C grid) 90.75464 km at 60N GIF PS
105 6889-point (83x83) N. Hemisphere Polar Stereographic grid oriented 105W; pole at (40.5,88.5). (U.S. area subset of NGM Super C grid, used by NAM model) 90.75464 km at 60N GIF PS
106 19305 point (165x117) N. Hemisphere Polar Stereographic grid oriented 105W; pole at (80,176) Hi res. NAM (2 x resolution of Super C) 45.37732 km at 60N GIF PS
107 11040 point (120x92) N. Hemisphere Polar Stereographic grid oriented 105W; pole at (46,167) subset of Hi res. NAM; for NAM & MAPS/RUC 45.37732 km at 60N GIF PS
110 LDAS Grid over CONUS (longitude/latitude grid)
See GRIB Specifications
1/8 degree GIF PS
119
83160-point(360x231) Curvi-linear Orthogonal Tri-Polar grid
See GRIB Specifications

GIF PS
120
2020800-point(1200X1684) Curvi-linear Orthogonal Grid of the Atlantic sector within 25.0S to 76.0N & -105.0W to 67.0E. 
See GRIB Specifications
2.40km - 25.25 km
GIF PS
122
162750-point(350X465) Curvi-linear Orthogonal Grid of the Gulf of Mexico sector within 18.0N to 33.0N & -99.0W to -77.0W. 
See GRIB Specifications
3.13km - 5.67km
GIF PS
123
100800-point(280X360) Curvi-linear Orthogonal Grid of the North West Atlantic sector within 33.0N to 54.0N & -77.0W to -46.0W. 
See GRIB Specifications
4.3km - 6.89km
GIF PS
124
75360-point(240X314) Curvi-linear Orthogonal Grid of the Middle West Atlantic sector within 26.0N to 42.0N & -84.0W to 63.0W. 
See GRIB Specifications
4.12 km - 6.28km
GIF PS
125
102000-point(300X340) Curvi-linear Orthogonal Grid of the South West Atlantic sector within 15.0N to 34.0N & -82.0W to -59.0W. 
See GRIB Specifications
4.59km - 7.67km
GIF PS
126 Global Gaussian T126 grid
See GRIB Specifications
0.9375 degree

127 Global Gaussian T254 grid
See GRIB Specifications
0.469 degree

128 Global Gaussian T382 grid
See GRIB Specifications
0.313 degree

129 Global Gaussian T574 grid
See GRIB Specifications
0.205 degree

130
Regional (CONUS) Lambert Conformal grid
See GRIB Specifications
13 km
GIF PS
132 Regional Double Resolution North American Grid (Lambert Conformal) used by SREF.
See GRIB Specifications
16.23174 km

138 Air-Quality Forecasting CONUS
See GRIB Specifications
12 km

139 Air-Quality Forecasting Hawaii
See GRIB Specifications
12 km

140 Air-Quality Forecasting Alaska
See GRIB Specifications
12 km

145 Air-Quality Forecasting Northeast Intermediate Domain
See GRIB Specifications
12 km GIF PS
146 Air-Quality Forecasting Northeast Output Domain
See GRIB Specifications
12 km GIF PS
147
Air-Quality Forecasting Eastern "3x" Output Domain
See GRIB Specifications
12 km GIF PS
148
Air-Quality Forecasting CONUS "5x" Output Domain
See GRIB Specifications
12 km GIF PS
150 Grid over Central America - LAT/LON grid (for CPC)
See GRIB Specifications
12 km

151 Grid over North America - Polar Stereographic
(Used by the 32-km NAM Model - Expanded domain)
See GRIB Specifications
32 km

160
North Polar Stereographic grid for Alaska (Quadruple grid 203)
See GRIB Specifications
47.5 km
GIF PS
161
Lat/Lon grid for Puerto Rico
See GRIB Specifications
0.5 degree
GIF PS
163
Regional (CONUS) Lambert Conformal grid
See GRIB Specifications
5 km


170 Global Gaussian T170 grid
See GRIB Specifications



171 Northern Hemisphere High Resolution Sea Ice grid (Polar Stereographic)
See GRIB Specifications
12.7 km
GIF PS
172 Southern Hemisphere High Resolution Sea Ice grid (Polar Stereographic)
See GRIB Specifications
12.7 km GIF PS
173
1/12 degree global Lat/Lon grid
See GRIB Specifications
0.5 degree


174
Global High Resolution Sea Ice grid (longitude/latitude grid)
See GRIB Specifications
0.125 degree


175  Lat/Lon grid over Guam
See GRIB Specifications
10 km lon/lat GIF PS
176
Lat/Lon grid for the US Great Lakes
See GRIB Specifications
0.050 x 0.035 degree

179
Grid over North America (Polar Stereographic)
(12km grid used to post-process NAM Analysis)
See GRIB Specifications
12 km

180
CONUS - Lat/Lon grid (for AFWA product)
See GRIB Specifications
12 km

181
Central America/Caribbean - Lat/Lon grid (for AFWA product)
See GRIB Specifications
12 km

182
Hawaii/North Pacific - Lat/Lon grid (for AFWA product)
See GRIB Specifications
12 km

183
Alaska - Lat/Lon grid (for AFWA product)
See GRIB Specifications
12 km

184 Grid over CONUS - (2.54 km) Lambert Conformal
(Used by RTMA ouput for Double-resolution NDFD grid)
See GRIB Specifications
2.54 km

185
Limited domain CONUS Lambert Conformal (used by the DGEX)
See GRIB Specifications
12 km


186
Limited domain Alaska Polar Stereographic (used by the DGEX)
See GRIB Specifications
12 km


187 Grid over CONUS - (2.54 km) Lambert Conformal
(Used by new CONUS RTMA domain ouput for Double-resolution NDFD grid)
See GRIB Specifications
2.54 km

188 Grid over CONUS - (2.54 km) Lambert Conformal
See GRIB Specifications
2.54 km

189 560025-point (655x855) - Polar Stereographic
(Used by Juneau RTMA for NDFD grids)
See GRIB Specifications
1.448 km

190 Staggered B-grid on rotated latitude/longitude grid (NAM 12km Domain)
See GRIB Specifications



192 91719-point (237x387) Arakawa staggered E-grid on rotated latitude/longitude grid.
See GRIB Specifications



193
1038240-point (1440x721)Global longitude-latitude with (1,1) at (0E,90N),matrix layout. N.B.: prime meridian not duplicated.
See GRIB Specifications
0.25 deg

194 Grid over Puert Rico - Mercator (Grid for NAM 3 km Puert Rico nest).
See GRIB Specifications
3.0 km

195 Grid over Puerto Rico - Mercator
(Used by RTMA and NAM smartinit output for NDFD grids)
See GRIB Specifications
2.5 km

196 Grid over Hawaii - Mercator
(Used by RTMA and NAM smartinit output for NDFD grids)
See GRIB Specifications
2.5 km

197 Grid over CONUS - 16X Resolution (5 km) Lambert Conformal
(Used by the Radar Stage IV precipitation analyses and Satellite-derived Precipitation Estimates and NAM DNG grids and RTMA NDFD grids)
See GRIB Specifications
5.079 km

198 Grid over Alaska - Polar Stereographic
(Used by RTMA and NAM smartinit output for NDFD grids)
See GRIB Specifications
5.953 km

199 Grid over Guam - Mercator
(Used by RTMA and GFS smartinit output for NDFD grids)
See GRIB Specifications
2.50 km

200 Puerto Rico FAA Regional Grid - (16.232 km) Lambert Conformal
See GRIB Specifications
16.232 km

201 Northern Hemispheric (Polar Stereographic).
See GRIB Specifications
381.000 km GIF PS
202 National - CONUS (Polar Stereographic).
See GRIB Specifications
190.500 km GIF PS
203 National - Alaska (Polar Stereographic).
See GRIB Specifications
190.500 km GIF PS
204 National - Hawaii (Mercator).
See GRIB Specifications
160.000 km GIF PS
205 National - Puerto Rico (Polar Stereographic).
See GRIB Specifications
190.500 km GIF PS
206 Regional - Central US MARD (Lambert Conformal).
See GRIB Specifications
81.2705 km GIF PS
207 Regional - Alaska (Polar Stereographic).
See GRIB Specifications
95.250 km GIF PS
208 Regional - Hawaii (Mercator).
See GRIB Specifications
80.000 km GIF PS
209 Regional - NOAMIM - Intermediate Resolution North American Master Grid (Lambert Conformal).
See GRIB Specifications
44.000 km GIF PS
210 Regional - Puerto Rico (Mercator).
See GRIB Specifications
80.000 km GIF PS
211 Regional - CONUS (Lambert Conformal).
See GRIB Specifications
80 km
GIF PS
212 Regional - CONUS - Double Resolution (Lambert Conformal).
See GRIB Specifications
40.63525 km GIF PS
213 National - CONUS - Double Resolution (Polar Stereographic).
See GRIB Specifications
95.250 km GIF PS
214 Regional - Alaska - Double Resolution (Polar Stereographic).
See GRIB Specifications
47.625 km GIF PS
215 Regional grid over the contiguous United States - Quadruple Resolution (used by the 29-km NAM Model) (Lambert Conformal).
See GRIB Specifications
20.317625 km GIF PS
216 Regional grid over Alaska (Polar Stereographic).
See GRIB Specifications
45.000 km GIF PS
217 Grid over Alaska - Double Resolution (Polar Stereographic).
See GRIB Specifications
22.500 km GIF PS
218 Grid over the Contiguous United States (used by the 12-km NAM Model) (Lambert Conformal).
See GRIB Specifications
12.19058 km GIF PS
219 Grid over the Northern Hemisphere to depict SSMI-derived ice concentrations (Polar Stereographic).
See GRIB Specifications
25.4 km GIF PS
220 Grid over the Southern Hemisphere to depict SSMI-derived ice concentrations (Polar Stereographic).
See GRIB Specifications
25.4 km GIF PS
221 Regional North American Grid (Lambert Conformal) used by NAM, SREF and RAP.
See GRIB Specifications
32.46341 km GIF PS
222 Regional - NOAMLO - Low Resolution North American Master Grid (Lambert Conformal).
See GRIB Specifications
88.00000 km GIF PS
223 Hemispheric - Double Resolution (Polar Stereographic).
See GRIB Specifications
190.500 km GIF PS
224 Southern Hemispheric (Polar Stereographic).
See GRIB Specifications
381.000 km GIF PS
225 National Double Resolution - Hawaii (Mercator).
See GRIB Specifications
80.000 km GIF PS
226 Regional grid over the contiguous United States - 8X Resolution (10 km) (Used by the Radar mosaics) (Lambert Conformal).
See GRIB Specifications
10.1588125 km GIF PS
227 Regional grid over the contiguous United States - 16X Resolution (5 km - Lambert Conformal)
(Used for Smoke and Dust system output products) See GRIB Specifications
5.079 km

228 Global (longitude/latitude grid).
See GRIB Specifications
2.500 degrees GIF PS
229 Global (longitude/latitude grid).
See GRIB Specifications
1.000 degrees GIF PS
230 Global (longitude/latitude grid).
See GRIB Specifications
0.500 degrees GIF PS
231 Northern Hemisphere (longitude/latitude grid).
See GRIB Specifications
0.500 degrees GIF PS
232 Northern Hemisphere (longitude/latitude grid).
See GRIB Specifications
1.000 degree GIF PS
233 Regional (longitude/latitude grid).
See GRIB Specifications
1.250 X 1.000 degrees GIF PS
234 Regional (longitude/latitude grid).
See GRIB Specifications
0.250 degrees GIF PS
235 Global (longitude/latitude grid).
See GRIB Specifications

GIF PS
236 Regional - CONUS (Lambert Conformal)
See GRIB Specifications
40.63525 km GIF PS
237 Puerto Rico FAA Regional Grid (Lambert Conformal)
See GRIB Specifications
32.46341 km GIF PS
238 Western North Atlantic (longitude/latitude grid)
See GRIB Specifications

GIF PS
239 Alaska Regional (longitude/latitude grid)
See GRIB Specifications

GIF PS
240 HRAP Grid over the Contiguous United States and Puerto Rico (Polar Stereographic)
See GRIB Specifications
4.7625 km

241 Regional - NOAMHI - High Resolution North American Grid (Lambert Conformal)
See GRIB Specifications
22.00000 km GIF PS
242 Grid over Alaska - Quadruple Resolution Grid (Polar Stereographic)
See GRIB Specifications
11.25 km GIF PS
243 Eastern North Pacific (longitude/latitude grid)
See GRIB Specifications

GIF PS
244 North Atlantic Hurricane (longitude/latitude grid)
See GRIB Specifications
0.250 degrees
GIF PS
245 Regional - NOAMHI - High Resolution over Eastern US (Lambert Conformal for 8 km NMM)
See GRIB Specifications
8.00000 km GIF PS
246 Regional - NOAMHI - High Resolution over Western US (Lambert Conformal for 8 km NMM)
See GRIB Specifications
8.00000 km GIF PS
247 Regional - NOAMHI - High Resolution over Central US (Lambert Conformal for 8 km NMM)
See GRIB Specifications
8.00000 km GIF PS
248 Puerto Rico (longitude/latitude grid)
See GRIB Specifications

GIF PS
249 Grid over Alaska for 10-km Alaska nest (Polar Stereographic)
See GRIB Specifications
9.86789 km GIF PS
250 Grid over Hawaii for 8 km NMM (longitude/latitude grid)
See GRIB Specifications

GIF PS
251 Coastal Ocean Forecast System Grid - North Atlantic Region (longitude/latitude grid)
See GRIB Specifications

GIF PS
252 Regional - CONUS (Lambert Conformal)
See GRIB Specifications
20.317625 km GIF PS
253 Eastern North Pacific Regional (longitude/latitude grid)
See GRIB Specifications

GIF PS
254
Mercator grid for Pacific Region
See GRIB Specifications
40 km
GIF PS
255 (non-defined grid - specified in the GDS)





NOTE ON NCEP STORAGE GRIDS:

On the Polar Stereographic grids, the vector wind is resolved into u and v components with respect to the grid coordinates, i.e., u represents motion in the direction of increasing x (i) coordinate, v in the direction of increasing y (j). On the latitude-longitude grids, u and v are true eastward and northward components, respectively. However, take note of Table 7, below, which allows for the specification of other possibilities when the Grid Description Section is included in the message.



INTERNATIONAL EXCHANGE AND FAMILY OF SERVICES (FOS) GRIDS


VALUE RESOLUTION
lon x lat (degrees)
AREA COVERAGE
(degrees)
GRID SHAPE
cols
rows
GRID POINTS
21 5.0 x 2.5 0-180E, 0-90N 37 36 + pole 1333
22 5.0 x 2.5 180W-0, 0-90N 37 36 + pole 1333
23 5.0 x 2.5 0-180E, 90S-0 pole + 37 36 1333
24 5.0 x 2.5 180W-0, 90S-0 pole + 37 36 1333
25 5.0 x 5.0 0-355E, 0-90N 72 18 + pole 1297
26 5.0 x 5.0 0-355E, 90S-0 pole + 72 18 1297
50 2.5 x 1.25 (see note iv)

964
61 2.0 x 2.0 0-180E, 0-90N 91 45 + pole 4096
62 2.0 x 2.0 180W-0, 0-90N 91 45 + pole 4096
63 2.0 x 2.0 0-180E, 90S-0 pole + 91 45 4096
64 2.0 x 2.0 180W-0, 90S-0 pole + 91 45 4096



NOTES ON INTERNATIONAL EXCHANGE/FOS GRIDS:

(i) The grid points are laid out in a linear array such that the longitude index (the columns) is the most rapidly varying. For the northern hemisphere grids the first point in the record is at the intersection of the western-most meridian and southern-most circle of latitude; the last point is the single Polar value (see note iii, below). For the southern hemisphere grids the first point in the record is the single Polar value (see note iii, below); the last point is at the intersection of the eastern-most meridian and northern-most circle of latitude. For those familiar with FORTRAN subscripting conventions, longitude is the first subscript, latitude the second.

(ii) In grids 21 through 26, and 61 through 64, the values on the shared boundaries are included in each area.

(iii) The datum for the pole point is given only once in each grid. The user must expand, if desired, the single pole point value to all the pole "points" at the pole row of a latitude-longitude grid. Scalar quantity values are the same for all pole points on a the grid. Wind components at the poles are given by the formulae:
u = -speed * sin(dd) & v = -speed * cos(dd)

where dd is the direction of the wind as reported according to the specification of wind direction at the poles (refer to WMO Manual on Codes, code table 878).

The WMO convention can be given this operational definition: At the North Pole, face into the wind and report the value of the west longitude meridian along which the wind is coming at you; at the South Pole do likewise but report the east longitude meridian value. This is equivalent to placing the origin of a right-handed Cartesian coordinate system on the North Pole with the y-axis pointing to the prime (0 degree) meridian and the x-axis pointing to the 90 degrees west meridian, and then resolving any vector wind at the pole point into components along those axes. At the South Pole the coordinate axes are oriented such that the y-axis points toward 180 degrees west. Those components are the u- and v-values given as the single pair of pole point winds in the GRIB format.

In terms of a longitude/latitude grid these are the wind components for the pole point at the 180 degree meridian. For example, on a 2.5x2.5 degree northern hemisphere grid (145x37 points), with the abscissa along the equator and the ordinate along the prime meridian, the transmitted north pole wind components are those that belong at the gridpoint (73,37). The wind components at the other grid points along the pole row may be obtained through suitable rotation of the coordinate system. All the components at the pole row are, of course, simply representations of the same vector wind viewed from differing (rotated) coordinate systems. In the southern hemisphere the analogous situation holds; the single set of transmitted pole point wind components belong at the gridpoint (73,1).

(iv) Grid 50 is a set of points over the contiguous United States and environs on a grid extending from 20N (row No. 1) to 60N (row No. 33) in 1.25 degree intervals. The grid increases in longitudinal extent from south to north in the following manner:

ROWS NO. POINTS LONGITUDINAL EXTENT
1-4 22 122.5W - 70.0W
5-8 24 125.0W - 67.5W
9-12 26 127.5W - 65.0W
13-16 28 130.0W - 62.5W
17-20 30 132.5W - 60.0W
21-24 32 135.0W - 57.5W
25-28 34 137.5W - 55.0W
29-33 36 140.0W - 52.5W

Top of Page



WAFS/ICAO/INTERNATIONAL EXCHANGE/FOS GRIDS

(Grids 37 - 44)

Global Coverage of Grids
Octants of the Globe

90N
37
I
38
J
39
K
40
L
41
M
42
N
43
O
44
P
0
90S

330E 60E 150E 240E 330E

In the figure the coordinates indicate the location of the octants of the globe, the numbers are the corresponding grid identification numbers (PDS Octet 7), and the letters are the grid identification used in the WMO heading (see Appendix A).

The left and right meridional columns of each octant/grid are shared with the neighbors.

The basic grid point separation is 1.25x1.25 deg. on a latitude/longitude array, but the grid is "thinned" by reducing the number of points in each row as one goes northward (or southward) away from the equator. In GRIB terms, this is referred to as a "quasi-regular" grid.

The latitudinal increment is always 1.25 deg.; this results in 73 rows where the pole is included as a "row", not a single gridpoint.

The longitudinal spacing at the equator is also 1.25 deg.; thus there will be 73 gridpoints at the equator in each octant.

The number of points on each latitudinal row, other than the equator, is given by (using FORTRAN notation):

NPOINTS = IFIX(2.0 + (90.0/1.25) * COS(LATITUDE))

Thus at the pole there will be two gridpoints, one each at the meridians that delineate the edges of the octant. The formula was worked out so that there is (approximately) equal geographic separation between the grid points uniformly across the globe.

Because of variations in precision and roundoff error in different computers, the value of NPOINTS may vary by 1 at "critical" latitudes when calculated on various hardware platforms. Here is a table of the exact values of NPOINTS as a function of latitude as used in the internationally exchanged grids. These numbers will, of course, be found in the Grid Description Section of each GRIB bulletin.

Latitude Range
inclusive
(north or south)
NPOINTS Latitude Range
inclusive
(north or south)
NPOINTS
0.00 - 8.75 73 55.00 43
10.00 - 12.50 72 56.25 42
13.75 - 16.25 71 57.50 40
17.50 - 18.75 70 58.75 39
20.00 - 21.25 69 60.00 38
22.50 68 61.25 36
23.75 - 25.00 67 62.50 35
26.25 66 63.75 33
27.50 - 28.75 65 65.00 32
30.00 64 66.25 30
31.25 63 67.50 29
32.50 62 68.75 28
33.75 61 70.00 26
35.00 - 36.25 60 71.25 25
37.50 59 72.50 23
38.75 58 73.75 22
40.00 57 75.00 20
41.25 56 76.25 19
42.50 55 77.50 17
43.75 54 78.75 16
45.00 52 80.00 14
46.25 51 81.25 12
47.50 50 82.50 11
48.75 49 83.75 9
50.00 48 85.00 8
51.25 47 86.25 6
52.50 45 87.50 5
53.75 44 88.75 3


90.00 2

When all this is put together the result is that there are 3447 points of data actually transmitted in any individual GRIB bulletin containing one octant of the globe.

In the GRIB bulletins all of this information will be included in the Grid Description Section (GDS); the GDS must be included in order to describe the thinned or "quasi-regular" grid structure. See Section 2 and Table C for the general description of the GDS; what follows are the specific values of the variables in the GDS that describe these eight grids.

GDAS Contents
Octets Value or variable
1-3 178 (length of GDS)
4 0 (or 255, either indicating no PV)
5 33 (pointer to start of PL list)
6 0
7-32 Grid description - see below
33-178 number of points in each of 73 rows (2 octets per point)


Details of Octets 7-32 - Grid Description

Octets Variable & Value
7-8 Ni = all bits set to 1 (missing)
9-10 Nj = 73

GRID: 37 38 39 40 41 42 43 44
La1 = 0 0 0 0 90S 90S 90S 90S
Lo1 = 330 60 150 240 330 60 150 240
11-13
14-16
17 Resolution & Component Flag = [10000000] (binary)

GRID: 37 38 39 40 41 42 43 44
La2 = 90N 90N 90N 90N 0 0 0 0
Lo2 = 60 150 240 330 60 150 240 330
18-20
21-23
24-25 Di = all bits set to 1 (missing)
26-27 Dj = 1.25 deg
28 Scan Mode = [01000000] (binary)
29-32 Set to 0 (unused)

Note that the scanning direction is from the bottom (south edge) to the top of the octant grids, regardless of the hemisphere. Thus in the northern hemisphere the first 73 data points (in the BDS) will be the equatorial values and the last two will be the Polar values. The PL counts in the GDS octets 33-178 will, of course, indicate contain these numbers.

In the southern hemisphere, the first two data points will be the south pole values, and the last 73 points will be the equatorial values. Octets 33-34 in the GDS will contain "2", octets 35-36 will contain a "3", and so on to octets 177-178 which will contain "73".

Top of Page



SELECTED NCEP GRIDS DEFINED USING GRIB SPECIFICATIONS
(See Table C, in Section 2, for definition of symbols)

VALUE GRID DESCRIPTIONS
1 Tropical Strip (Mercator)


Ni 73
Nj 23
La1 48.09S
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 48.090N
Lo2 0.000W
Latin 22.5
Di 513.669 km
Dj 513.669 km
Scanning Mode (bits 1 2 3) 0 1 0


The longitudinal grid spacing is 5.00 degrees.


Top of Page



VALUE GRID DESCRIPTIONS
3 Global Latitude/Longitude 1 deg Resolution


Ni 360
Nj 181
La1 90.000N
Lo1 0.0E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 90.000S
Lo2 359.000E = 1.000W
Di 1.000 degrees
Dj 1.000 degrees
Scanning Mode 00000000(NB: matrix style)


Top of Page



VALUE GRID DESCRIPTIONS
10 Latitude/Longitude Ocean grid
with (1,1) at (1E,64E) and (180,139) at (1W,74S)
I increasing Eastward, Equator at J=65

Ni 180
Nj 139
La1 64.000N
Lo1 1.0E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 74.000S
Lo2 359.000E = 1.000W
Di 2.000 degrees
Dj 1.000 degrees
Scanning Mode 0 0 0(NB: matrix style)


Top of Page



VALUE GRID DESCRIPTIONS
11 Global 0.5 degree Latitude/Longitude grid
(Used by Global Multi-Grid Wave Model (Static Grids)


Ni 720
Nj 336
La1 90.000N
Lo1 0.0E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 77.500S
Lo2 359.500E = 0.500W
Di 0.500 degrees
Dj 0.500 degrees
Scanning Mode 0 0 0(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) 90.000N, 0.000E
(1,311) 77.500S, 0.000E
(720,311) 77.500S, 359.500E
(720,1) 90.000N, 359.500E


Top of Page



VALUE GRID DESCRIPTIONS
12 0.167 degree Latitude/Longitude for the US East Coast grid
(Used by Global Multi-Grid Wave Model (Static Grids)


Ni 301
Nj 331
La1 55.000N
Lo1 260.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 0.00N
Lo2 310.000E = 50.000W
Di 0.167 degrees
Dj 0.167 degrees
Scanning Mode 0 0 0(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) 55.000N, 260.000E
(1,331) 0.000N, 260.000E
(301,331) 0.000N, 310.000E
(301,1) 55.000N, 310.000E


Top of Page



VALUE GRID DESCRIPTIONS
13 0.167 degree Latitude/Longitude for the US West Coast grid
(Used by Global Multi-Grid Wave Model (Static Grids)


Ni 241
Nj 151
La1 50.000N
Lo1 210.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 25.000N
Lo2 250.000E = 110.000W
Di 0.167 degrees
Dj 0.167 degrees
Scanning Mode 0 0 0(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) 50.000N, 210.000E
(1,151) 25.000N, 210.000E
(241,151) 25.000N, 250.000E
(241,1) 50.000N, 250.000E


Top of Page



VALUE GRID DESCRIPTIONS
14 0.167 degree Latitude/Longitude grid
(for the Easter Pacific; includes Hawaii and extends to the Pacifici islands of Guam etc.)
(Used by Global Multi-Grid Wave Model (Static Grids)


Ni 511
Nj 301
La1 30.000N
Lo1 130.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 20.000S
Lo2 215.000E = 145.000W
Di 0.167 degrees
Dj 0.167 degrees
Scanning Mode 0 0 0(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) 30.000N, 130.000E
(1,301) 20.000S, 130.000E
(511,301) 20.000S, 215.000E
(511,1) 30.000N, 215.000E


Top of Page



VALUE GRID DESCRIPTIONS
15 0.25 x 0.167 degree Latitude/Longitude grid for Alaska
(Used by Global Multi-Grid Wave Model (Static Grids)


Ni 401
Nj 187
La1 75.000N
Lo1 140.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 44.000N
Lo2 240.000E = 120.000W
Di 0.250 degrees
Dj 0.167 degrees
Scanning Mode 0 0 0(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) 75.000N, 140.000E
(1,187) 44.000N, 140.000E
(401,187) 44.000N, 240.000E
(401,1) 75.000N, 240.000E


Top of Page



VALUE GRID DESCRIPTIONS
16 0.133 x 0.067 degree Latitude/Longitude grid for Alaska
(Used by Global Multi-Grid Wave Model (Static Grids)


Ni 548
Nj 391
La1 74.000N
Lo1 165.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 48.000N
Lo2 237.933E = 122.067W
Di 0.133 degrees
Dj 0.067 degrees
Scanning Mode 0 0 0(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) 74.000N, 165.000E
(1,391) 48.000N, 165.000E
(548,391) 48.000N, 237.933E
(548,1) 74.000N, 237.933E


Top of Page



VALUE GRID DESCRIPTIONS
17 0.067 degree Latitude/Longitude grid for the US West Coast ; includes Hawaii
(Used by Global Multi-Grid Wave Model (Static Grids)


Ni 736
Nj 526
La1 50.000N
Lo1 195.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 15.000N
Lo2 244.000E = 116.000W
Di 0.067 degrees
Dj 0.067 degrees
Scanning Mode 0 0 0(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) 50.000N, 195.000E
(1,526) 15.000N, 195.000E
(736,526) 15.000N, 244.000E
(736,1) 50.000N, 244.000E


Top of Page



VALUE GRID DESCRIPTIONS
18 0.067 degree Latitude/Longitude grid for the US East Coast
(Used by Global Multi-Grid Wave Model (Static Grids)


Ni 586
Nj 481
La1 47.000N
Lo1 261.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 15.000N
Lo2 300.000E = 60.000W
Di 0.067 degrees
Dj 0.067 degrees
Scanning Mode 0 0 0(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) 47.000N, 261.000E
(1,481) 15.000N, 261.000E
(586,481) 15.000N, 300.000E
(586,1) 47.000N, 300.000E


Top of Page



VALUE GRID DESCRIPTIONS
45 Global Latitude/Longitude 1.25 deg Resolution


Ni 288 (prime meridian not duplicated)
Nj 145
La1 90.000N
Lo1 0.0E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 90.000S
Lo2 358.750E = 1.250W
Di 1.250 degrees
Dj 1.250 degrees
Scanning Mode 00000000 (NB: matrix style)


Top of Page



VALUE GRID DESCRIPTIONS
83 Arakawa semi-staggered A-grid on rotated
latitude/longitude grid (Used by 13km Rapid Refresh)


Ni 758
Nj 567
La1 2.228N
Lo1 219.519E = 140.481W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 47.500N
Lo2 256.000E = 104.000W
Di 121 millidegrees
Dj 121 millidegrees
Scanning Mode 01000000


Top of Page



VALUE GRID DESCRIPTIONS
87 U.S. Area; used in MAPS/RUC (60km at 40N) (N. Hem. Polar Stereographic)


Nx 81
Ny 62
La1 22.8756N
Lo1 239.5089E = 120.4911W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 255.000E = 105.000W
Lo2 0.000W
Dx 68.153 km
Dy 68.153 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 22.8756N, 120.4911W
(1,62) 52.4887N, 136.5458W
(81,62) 46.0172N, 60.8284W
(81,1) 20.1284N, 81.2432W
Pole point
(I,J) (31.91, 112.53)





Top of Page



VALUE GRID DESCRIPTIONS
88 North American Area; used in RSAS (Polar Stereographic)


Nx 580
Ny 548
La1 10.000N
Lo1 232.000E = 128.000W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 255.000E = 105.000W
Dx 15.000 km
Dy 15.000 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 10.000N, 128.000W
(1,548) 52.648N, 179.080E
(580,548) 45.316N, 26.542W
(580,1) 7.885N, 77.466W
Pole point
(I,J) (260.853, 613.176)





Top of Page




VALUE GRID DESCRIPTIONS
90  Grid over CONUS - (1.27 km)
(Used by RTMA output for quadruple-resolution NDFD grid) (Lambert Conformal)


Nx 4289
Ny 2753
La1 20.192N
Lo1 238.446E = 121.554W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 1.270 km
Dy 1.270 km
Projection Flag (bit 1) 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)


Top of Page



VALUE GRID DESCRIPTIONS
91 Grid over Alaska (Polar Stereographic)
(Used by RTMA and NAM smartinit output for double-resolution NDFD grids)

Nx 1649
Ny 1105
La1 40.530N
Lo1 181.429E = 178.571W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 210.000E = 150.000W
Dx 2.976 km
Dy 2.976 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 40.5301N, 178.5710W
(1,533) 61.3989N, 209.8080W
(825,553) 63.9757N, 93.6918W
(825,1) 41.7390N, 124.5816W
Pole point
(I,J) (881.012, 1617.036)


Top of Page



VALUE GRID DESCRIPTIONS
92 Grid over Alaska (Polar Stereographic)
(Used by RTMA and NAM smartinit output for quadruple-resolution NDFD grids)

Nx 3297
Ny 2209
La1 40.530N
Lo1 181.429E = 178.571W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 210.000E = 150.000W
Dx 1.488 km
Dy 1.488 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 40.5301N, 178.5710W
(1,533) 61.3989N, 209.8080W
(825,553) 63.9757N, 93.6918W
(825,1) 41.7390N, 124.5816W
Pole point
(I,J) (1761.026, 3233.076)


Top of Page



VALUE GRID DESCRIPTIONS
93 Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Alaska)


Ni 223
Nj 501
La1 45.232N
Lo1 190.004E = 169.996W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 63.000N
Lo2 210.000E = 150.000W
Di 67 millidegrees (=1/15 deg)
Dj 66 millidegrees (=5/76 deg)
Scanning Mode 01000000


Top of Page



VALUE GRID DESCRIPTIONS
94 Staggered B-grid on rotated latitude/longitude grid (NAM Alaska 6km nest)


Ni 595
Nj 625
La1 34.921N
Lo1 198.337E = 161.663W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 54.000N
Lo2 254.000E = 106.000W
Di 63 millidegrees
Dj 54 millidegrees
La3 83.711N
Lo3 208.279E = 151.721W
Scanning Mode 01000000


Top of Page



VALUE GRID DESCRIPTIONS
95 Staggered B-grid on rotated latitude/longitude grid (NAM Puerto Rico 3km nest)


Ni 401
Nj 325
La1 17.609N
Lo1 283.673E = 76.327W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 54.000N
Lo2 254.000E = 106.000W
Di 31 millidegrees
Dj 27 millidegrees
La3 18.840N
Lo3 298.379E = 61.621W
Scanning Mode 01000000


Top of Page



VALUE GRID DESCRIPTIONS
96 Staggered B-grid on rotated latitude/longitude grid (NAM Hawaii 3km nest)


Ni 373
Nj 561
La1 11.625N
Lo1 203.661E = 156.339W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 54.000N
Lo2 254.000E = 106.000W
Di 31 millidegrees
Dj 27 millidegrees
La3 30.429N
Lo3 202.173E = 157.827W
Scanning Mode 01000000


Top of Page



VALUE GRID DESCRIPTIONS
97 Staggered B-grid on rotated latitude/longitude grid (NAM CONUS 4km nest)


Ni 1371
Nj 1100
La1 15.947N
Lo1 234.532E = 125.468W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 54.000N
Lo2 254.000E = 106.000W
Di 42 millidegrees
Dj 36 millidegrees
La3 45.407N
Lo3 307.610E = 52.390W
Scanning Mode 01000000


Top of Page



VALUE GRID DESCRIPTIONS
98 Global Gaussian Latitude/Longitude T62 Resolution


Ni 192
Nj 94
La1 88.542N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 88.542S
Lo2 358.125E = 1.875W
Di 1.875 degrees
N 47 (number of lat. circles, pole to equator)
Scanning Mode 00000000(NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 88.542N, 0.000E (upper left)
(1,190) 88.542S, 0.000E
(384,190) 88.542S, 359.0625E
(384,1) 88.542N, 359.0625E


Top of Page



VALUE GRID DESCRIPTIONS
99 Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 12 km NAM model - expanded domain)

Ni 669
Nj 1165
La1 7.450S
Lo1 215.860E = 144.140W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 54.000N
Lo2 254.000E = 106.000W
Di 90 millidegrees (=60/668 deg)
Dj 77 millidegrees (=45/582 deg)
Scanning Mode 01000000


Top of Page



VALUE GRID DESCRIPTIONS
110 LDAS Grid over CONUS (longitude/latitude grid)


Ni 464
Nj 224
La1 25.0625N
Lo1 235.0625E = 124.9375W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 52.9375N
Lo2 292.9375E = 67.0625W
Di 0.125 degrees
Dj 0.125 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 25.0625N, 235.0625E
(1,224) 52.9375N, 235.0625E
(464,224) 52.9375N, 292.9375E
(464,1) 25.0625N, 292.9375E


Top of Page



VALUE GRID DESCRIPTIONS
119 Curvilinear Orthogonal Grid (Tri-Polar grid)

Ni 360
Nj 231
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Scanning Mode 0 1 0 0 0 0 0 0
Lat/Lon values of the corners of the grid
(1,1) 90.000E, 80.000S
(1,231) 90.000E, 89.500N
(360,231) 300.000W, 89.500N
(360,1) 300.000W, 80.000S

Note:Periodic grid in Longitude; joined at 90.00E.


Top of Page




VALUE GRID DESCRIPTIONS
120 Curvilinear Orthogonal Grid (Atlantic Sector)

Ni 1200
Nj 1684
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Scanning Mode 0 1 0 0 0 0 0 0
Lat/Lon values of the corners of the grid
(1,1) 67.928E, 23.555S
(1200,1) 49.066W, 76.466N
(1200,1684) 105.033W, 37.141N
(1,1684) 103.109W,  2.664N


Top of Page



VALUE GRID DESCRIPTIONS
122 Curvilinear Orthogonal Grid (Gulf Of Mexico)

Ni 350
Nj 465
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Scanning Mode 0 1 0 0 0 0 0 0
Lat/Lon values of the corners of the grid
(1,1) 77.498W, 18.681N
(350,1) 81.93W, 33.974N
(350,465) 99.153W, 28.671N
(1,465) 97.749W,  18.03N


Top of Page



VALUE GRID DESCRIPTIONS
123 Curvilinear Orthogonal Grid (North Atlantic)

Ni 280
Nj 360
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Scanning Mode 0 1 0 0 0 0 0 0
Lat/Lon values of the corners of the grid
(1,1) 46.513W, 42.832N
(280,1) 60.222W, 54.206N
(280,360) 77.342W, 44.33N
(1,360) 69.369W,  33.639N


Top of Page



VALUE GRID DESCRIPTIONS
124 Curvilinear Orthogonal Grid (Middle Atlantic)

Ni 240
Nj 315
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Scanning Mode 0 1 0 0 0 0 0 0
Lat/Lon values of the corners of the grid
(1,1) 63.379W, 31.64N
(240,1) 70.238W, 42.368N
(240,314) 84.521W, 35.948N
(1,314) 80.519W,  26.879N


Top of Page



VALUE GRID DESCRIPTIONS
125 Curvilinear Orthogonal Grid (South Atlantic)

Ni 300
Nj 340
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Scanning Mode 0 1 0 0 0 0 0 0
Lat/Lon values of the corners of the grid
(1,1) 59.720W, 16.962N
(300,1) 65.143W, 34.53N
(300,340) 82.738W, 28.949N
(1,340) 80.427W, 15.491N


Top of Page



VALUE GRID DESCRIPTIONS
126 Global Gaussian Latitude/Longitude T126 Resolution


Ni 384
Nj 190
La1 89.277N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 89.277S
Lo2 359.0625E = 0.9375W
Di .9375 degrees
N 95 (number of lat. circles, pole to equator)
Scanning Mode 00000000(NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 89.277N, 0.000E (upper left)
(1,190) 89.277S, 0.000E
(384,190) 89.277S, 359.0625E
(384,1) 89.277N, 359.0625E


Top of Page



VALUE GRID DESCRIPTIONS
127 Global Gaussian Latitude/Longitude T254 Resolution


Ni 768
Nj 384
La1 89.642N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 89.642S
Lo2 359.531E = 0.469W
Di 0.469 degrees
N 192 (number of lat. circles, pole to equator)
Scanning Mode 00000000(NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 89.642N, 0.000E (upper left)
(1,190) 89.642S, 0.000E
(384,190) 89.642S, 359.531E
(384,1) 89.642N, 359.531E


Top of Page



VALUE GRID DESCRIPTIONS
128 Global Gaussian Latitude/Longitude T382 Resolution


Ni 1152
Nj 576
La1 89.761N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 89.761S
Lo2 359.687E = 0.313W
Di 0.313 degrees
N 288 (number of lat. circles, pole to equator)
Scanning Mode 00000000(NB: matrix style)


Top of Page



VALUE GRID DESCRIPTIONS
129 Global Gaussian Latitude/Longitude T574 Resolution


Ni 1760
Nj 880
La1 89.844N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 89.844S
Lo2 359.795E = 0.205W
Di 0.205 degrees
N 440 (number of lat. circles, pole to equator)
Scanning Mode 00000000(NB: matrix style)


Top of Page



VALUE GRID DESCRIPTIONS
130 () Regional - CONUS (Lambert Conformal) - 13 km


Nx 451
Ny 337
La1 16.281N
Lo1 233.862E = 126.138W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 13.545087 km
Dy 13.545087 km
Projection Flag 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 25.000N
Latin 2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 16.281N, 126.138W
(1,337) 54.172N, 139.856W
(451,337) 55.481N, 57.383W
(451,1) 17.340N, 69.039W
Pole point
(I,J) (249.315, 1051.539)


Top of Page



VALUE  GRID DESCRIPTIONS
132 Regional Double Resolution North American Grid (Lambert Conformal) used by SREF


Nx 697
Ny 553
La1 1.000N
Lo1 214.500E = 145.500W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 253.000E = 107.000W
Dx 16.23174 km
Dy 16.23174 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 50.000N
Latin2 50.000N
Lat/Lon values of the corners of the grid
(1,1) 1.000N, 145.500W
(1,553) 46.635N, 148.638E
(697,553) 46.352N, 2.566W
(697,1) 0.897N, 68.318W
Pole point
(I,J) (348.014, 614.527)


The Dx, Dy grid increment (at 50 deg north) was selected so that the grid spacing would be exactly 16.000 km at 40 deg north; the intersection of 40N & 107W falls on point (348.014,216.327)


Top of Page



VALUE GRID DESCRIPTIONS
138 Air-Quality Forecasting CONUS

Nx 468
Ny 288
La1 21.017N
Lo1 236.718E = 123.282W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 263.000E = 97.000W
Dx 12 km
Dy 12 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Latin 1 33.000N
Latin 2 45.000N
Lat/Lon values of the corners of the grid
(1,1) 21.017N, 123.282W
(1,288) 48.772N, 131.669W
(468,288) 47.769N, 58.775W
(468,1) 21.146N, 70.793W


Top of Page



VALUE GRID DESCRIPTIONS
139 Air-Quality Forecasting Hawaii

Nx 80
Ny 52
La1 17.721N
Lo1 198.027E = 161.973W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 202.500E = 157.500W
Dx 12 km
Dy 12 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Latin 1 19.000N
Latin 2 21.000N


Top of Page



VALUE GRID DESCRIPTIONS
140 Air-Quality Forecasting Alaska

Nx 199
Ny 163
La1 53.020N
Lo1 193.523E = 166.477W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 211.400E = 148.600W
Dx 12 km
Dy 12 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Latin 1 57.000N
Latin 2 63.000N


Top of Page



VALUE GRID DESCRIPTIONS
145 Air-Quality Forecasting Northeast Intermediate Domain

Nx 169
Ny 145
La1 32.174N
Lo1 269.841E = 90.159W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 280.500E = 79.500W
Dx 12 km
Dy 12 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Latin 1 36.000N
Latin 2 46.000N
Lat/Lon values of the corners of the grid
(1,1) 32.174N, 90.159W
(1,145) 47.586N, 92.962W
(169,145) 47.586N, 66.038W
(169,1) 32.174N, 68.841W
Pole point
(I,J) (85.046, 685.323)


Top of Page



VALUE GRID DESCRIPTIONS
146 Air-Quality Forecasting Northeast Output Domain

Nx 166
Ny 142
La1 32.353N
Lo1 270.006E = 89.994W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 280.500E = 79.500W
Dx 12 km
Dy 12 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Latin 1 36.000N
Latin 2 46.000N
Lat/Lon values of the corners of the grid
(1,1) 32.353N, 89.994W
(1,142) 47.451N, 92.689W
(166,142) 47.451N, 66.311W
(166,1) 32.353N, 69.006W
Pole point
(I,J) (83.551, 683.821)


Top of Page


VALUE GRID DESCRIPTIONS
147 Air-Quality Forecasting Eastern "3x" Domain

Nx 268
Ny 259
La1 24.595N
Lo1 259.002E = 100.998W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 263.000E = 97.000W
Dx 12 km
Dy 12 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Latin 1 33.000N
Latin 2 45.000N
Lat/Lon values of the corners of the grid
(1,1) 24.595N, 100.998W
(1,259) 52.293N, 102.955W
(268,259) 47.180N, 59.163W
(268,1) 21.146N, 70.793W


Top of Page



VALUE GRID DESCRIPTIONS
148 Air-Quality Forecasting CONUS "5x" Domain

Nx 442
Ny 265
La1 21.821N
Lo1 239.372E = 120.628W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 263.000E = 97.000W
Dx 12 km
Dy 12 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Latin 1 33.000N
Latin 2 45.000N
Lat/Lon values of the corners of the grid
(1,1) 21.821N, 120.628W
(1,265) 48.772N, 131.669W
(442,265) 47.769N, 58.775W
(442,1) 21.146N, 70.793W


Top of Page



VALUE GRID DESCRIPTIONS
150 Central America - Latitude/Longitude grid
for 12km NAM (used by CPC)

Nx 401
Ny 201
La1 5.000N
Lo1 260.000E = 100.000W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 25.000N
Lo2 300.000E = 60.000W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 5.000N, 260.000E
(1,401) 25.000N, 260.000E
(201,401) 25.000N, 300.000E
(201,1) 5.000N,300.000E


Top of Page



VALUE GRID DESCRIPTIONS
151 Grid over North America (Polar Stereographic)
(Used by the 32-km NAM Model - Expanded domain)

Nx 478
Ny 429
La1 7.450S
Lo1 215.860E = 144.140W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 250.000E = 110.000W
Dx 33.812 km
Dy 33.812 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 7.450S , 144.140W
(1,429) 20.345N, 136.780E
(478,429) 14.906N, 0.928E
(478,1) 9.665S, 72.743W
Pole point
(I,J) (225.819, 332.558)


Top of Page


 STORAGE AND TRANSMISSION GRIDS

Note: Grids 160-175 below are intended for use in the U.S. Weather Service's Advanced Weather Information Processing System (AWIPS). Their definition is subject to change as the AWIPS requirements are further refined. The parenthetical letters adjacent to the numeric values are the WMO header identification of the grid for headers starting with "Y" or "Z". For headers starting with "O", the bracketed letter is the WMO header identification for oceanographic grids. See appendix A.

VALUE GRID DESCRIPTIONS
160 [Z] 47.5 km North Polar Stereographic grid for Alaska
(Quadruple grid 203)

Nx 180
Ny 156
La1 19.132N
Lo1 174.163E = 185.837W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 210.000E = 150.000W
Dx 47.625 km
Dy 47.625 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0


Top of Page



VALUE GRID DESCRIPTIONS
161 [Z] 0.5 degree Lat/Lon grid for Puerto Rico

Ni 137
Nj 102
La1 50.750N
Lo1 271.750E
Res. & Comp. Flag 0 1 0 0 1 0 0 0
La2 0.250S
Lo2 340.250E = 19.750W
Di 0.500 degrees
Dj 0.500 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)


Top of Page



VALUE  GRID DESCRIPTIONS
163 () Regional - CONUS 5 km grid


Nx 1008
Ny 722
La1 20.600N
Lo1 241.700E = 118.300W
Res. & Comp. Flag 0 0 0 0 0 1 0 0
Lov 265.000E = 95.000W
Dx 5.000 km
Dy 5.000 km
Projection Flag 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 38.000N
Latin 2 38.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 118.3W, 20.6N
(1,722) 71.512W, 20.555N
(1008,722) 130.77W, 51.09N
(1008,1) 58.958W, 51.02N
Pole point
(I,J)


Top of Page



VALUE GRID DESCRIPTIONS
170 Global Gaussian Latitude/Longitude T170 Resolution


Ni 512
Nj 256
La1 89.463N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 89.463S
Lo2 359.2975E = 0.7025W
Di  degrees
N  (number of lat. circles, pole to equator)
Scanning Mode 00000000(NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 89.463N, 0.000E (upper left)
(1,190) 89.463S, 0.000E
(384,190) 89.463S, 359.2975E
(384,1) 89.463N, 359.2975E


Top of Page



VALUE GRID DESCRIPTIONS
171 [Z]  Northern Hemisphere High Resolution Sea Ice Grid (Polar Stereographic)


Ni 770
Nj 930
La1 25.032N
Lo1 240.440331E = 119.559669W
Res. & Comp. Flag 0 0 0 0 0 0 0 0
Lov 280.000E = 80.000W
Dx 12.7 km at 60N
Dy 12.7 km at 60N
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 010 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 25.032000N, 119.559669W
(1,930) 24.401091N, 139.015594E
(770,930) 23.906467N, 60.326862E
(770,1) 24.561102N, 39.780396W
Pole point
(I,J) (384.000, 462.000)


Top of Page



VALUE GRID DESCRIPTIONS
172 [Z]  Southern Hemisphere High Resolution Sea Ice Grid (Polar Stereographic)


Ni 690
Nj 710
La1 36.899599S
Lo1 139.805573E = 220.194427W
Res. & Comp. Flag 0 1 0 0 1 0 0 0
Lov 280.000E = 80.000W
Dx 12.7 km at 60S
Dy 12.7 km at 60S
Projection Flag (bit 1) 1
Scanning Mode (bits 1 2 3) 010
Lat/Lon values of the corners of the grid
(1,1) 36.899599S, 220.194427W
(1,710) 37.726955S, 120.682312W
(690,710) 31.025953S, 307.217285W
(690,1) 31.717993S, 31.897572W
Pole point
(I,J) (302.000, 362.000)


Top of Page



VALUE GRID DESCRIPTIONS
173 [Z] Global 1/12 degree Lat/Lon grid

Ni 4320
Nj 2160
La1 89.958333 N
Lo1 0.041667 E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2
89.958333 S
Lo2 359.958333 E
Di 0.083333
Dj 0.083333
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 000
Lat/Lon values of the corners of the grid
(1,1) 89.958336, 0.041667
(4320,1) 89.958336, 359.958344
(1, 2160) -89.958336, 0.041667
(4320,2160) -89.958336, 359.958344


Top of Page



VALUE GRID DESCRIPTIONS
174 [Z]  Global High Resolution Sea Ice grid (longitude/latitude grid)


Ni 2880
Nj 1440
La1 89.9375N
Lo1 0.0625E
Res. & Comp. Flag 0 1 0 0 1 0 0 0
La2 89.9375S
Lo2 359.9375E = 0.0625W
Di 0.125 degrees
Dj 0.125 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 010 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 89.9375N, 0.0625E
(1,1440) 89.9375S, 0.0625E
(2880,1440) 89.9375S, 359.9375E
(2880,1) 89.9375N, 359.9375E


Top of Page



VALUE GRID DESCRIPTIONS
175 (C)  Grid over Guam (10 km longitude/latitude grid)

Ni 556
Nj 334
La1 0.000N
Lo1 130.000E
La2 30.060N
Lo2 180.040E
Di 0.09 degrees
Dj 0.09 degrees
Res. & Comp. Flag 1 0 0 0 0 0 0 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)


Top of Page



VALUE GRID DESCRIPTIONS
176 () 0.050 x 0.035 degree Lat/Lon grid for the US Great Lakes

Ni 327
Nj 235
La1 49.10 N
Lo1 267.8 E = 92.2 W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 40.908 N
Lo2 284.1 E = 75.9 W
Di
0.050
Dj
0.035
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1)
49.100 N, 267.800 E
(1,235)
40.908 N, 267.800 E
(327,235)
40.908 N, 284.100 E
(327,1)
49.100 N, 284.100 E


Top of Page



VALUE GRID DESCRIPTIONS
179 Grid over North America (Polar Stereographic)
(12km grid used to post-process NAM Analysis)

Nx 1196
Ny 871
La1 2.500S
Lo1 217.500E = 142.500W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 260.000E = 100.000W
Dx 12.679km
Dy 12.679km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 2.500S, 142.500W
(1,817) 19.0381N, 161.928E
(1196,817) 29.9898N, 0.0189W
(1196,1) 2.49364S, 63.556W
Pole point
(I,J) (662.730, 723.152)


Top of Page



VALUE GRID DESCRIPTIONS
180 () CONUS - Latitude/Longitude grid (for AFWA product)

Ni 759
Nj 352
La1 55.054N
Lo1 233.0 E = 127.0 W
Res.& Comp. Flag 1 0 0 0 0 0 0 0
La2 17.146 N
Lo2 314.864 E = 45.136 W
Di 0.108
Dj 0.108
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1)
55.054N , 127.000 W
(1,352)
17.146 N, 127.000 W
(759,352)
17.146 N, 45.136 W
(759,1)
55.054 N, 45.136 W


Top of Page



VALUE GRID DESCRIPTIONS
181 () Central America/Caribbean - Latitude/Longitude grid (for AFWA product)

Ni 370
Nj 278
La1 30.054N
Lo1 260.0 E = 100.0 W
Res.& Comp. Flag 1 0 0 0 0 0 0 0
La2 0.138 N
Lo2 299.852 E = 60.148 W
Di 0.108
Dj 0.108
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1)
30.054N , 100.000 W
(1,278)
0.138 N, 100.000 W
(370,278)
0.138 N, 60.148 W
(370,1)
30.054 N, 60.148 W


Top of Page



VALUE GRID DESCRIPTIONS
182 () Hawaii/North Pacific - Latitude/Longitude grid (for AFWA product)

Ni 278
Nj 231
La1 32.973N
Lo1 190.0 E = 170.0 W
Res.& Comp. Flag 1 0 0 0 0 0 0 0
La2 8.133 N
Lo2 219.916 E = 140.084 W
Di 0.108
Dj 0.108
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1)
37.973N , 170.000 W
(1,231)
17.146 N, 45.136 W
(278,231)
8.133 N, 140.084 W
(278,1)
37.973 N, 140.084 W


Top of Page



VALUE GRID DESCRIPTIONS
183 () Alaska - Latitude/Longitude grid (for AFWA product)

Ni 648
Nj 278
La1 75.054N
Lo1 160.0 E = 200.0 W
Res.& Comp. Flag 1 0 0 0 0 0 0 0
La2 45.138 N
Lo2 220.876 E = 130.124 W
Di 0.108
Dj 0.108
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1)
75.054N , 160.000 E
(1,278)
45.138 N, 160.000 E
(648,278)
45.138 N, 130.124W
(648,1)
75.054 N, 130.124 W


Top of Page




VALUE GRID DESCRIPTIONS
184  Grid over CONUS - (2.54 km)
(Used by RTMA output for Double-resolution NDFD grid) (Lambert Conformal)


Nx 2145
Ny 1377
La1 20.192N
Lo1 238.446E = 121.554W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 2.540 km
Dy 2.540 km
Projection Flag (bit 1) 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)


Top of Page



VALUE GRID DESCRIPTIONS
185 (C) 12 km LCC limited domain CONUS grid (used by DGEX)

Ni 491
Nj 303
Pojection Angles
40.00, -98.00, 40.00
Dx 12 km at 40 N
Dy 12 km at 40 N
Grid Bounds
(19.9433, -125.0932)(49.8812, -56.2855)


Top of Page



VALUE GRID DESCRIPTIONS
186 (C) 12 km PSG limited domain Alaska grid (used by DGEX)

Ni 377
Nj 237
Pojection Angles
90.00, -157.00, 0.00
Dx 12 km at 61 N
Dy 12 km at 61 N
Grid Bounds
(44.1960, -185.2411)(64.8206, -104.2081)


Top of Page




VALUE GRID DESCRIPTIONS
187  Grid over CONUS - (2.54 km) - Lambert Conformal
(Used by new CONUS RTMA domain ouput for Double-resolution NDFD grid)


Nx 2145
Ny 1597
La1 20.192N
Lo1 238.446E = 121.554W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 2.540 km
Dy 2.540 km
Projection Flag (bit 1) 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)


Top of Page




VALUE GRID DESCRIPTIONS
188  Grid over CONUS - (2.54 km) - Lambert Conformal


Nx 709
Ny 795
La1 37.979N
Lo1 234.042 = 125.958W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 2.540 km
Dy 2.540 km
Projection Flag (bit 1) 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)


Top of Page



VALUE GRID DESCRIPTIONS
189 Polar Stereographic
(Used by Juneau RTMA for NDFD grids)


Nx 655
Ny 855
La1 51.500N
Lo1 217.500E = 142.500W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 225.000E = 135.000W
Dx 1.448 km
Dy 1.448 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 51.5000N, 142.5000W
(1,855) 62.3110N, 145.6574W
(655,855) 62.5124N, 126.9875W
(655,1) 51.6341N, 129.3763W


Top of Page



VALUE GRID DESCRIPTIONS
190 Staggered B-grid on rotated latitude/longitude grid (NAM 12km Domain)


Ni 954
Nj 835
La1 7.491S
Lo1 215.866E = 144.134W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 54.000N
Lo2 254.000E = 106.000W
Di 126 millidegrees
Dj 108 millidegrees
La3 44.540N
Lo3 14.802E = 345.198W
Scanning Mode 01000000


Top of Page



VALUE GRID DESCRIPTIONS
192 Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 32 km NAM model)


Ni 237
Nj 387
La1 3.441S
Lo1 211.201E = 148.799W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 50.000N
Lo2 249.000E = 111.000W
Di 225 millidegrees (=53/236 deg)
Dj 207 millidegrees (=40/193 deg)
Scanning Mode 01000000


Top of Page



VALUE  GRID DESCRIPTIONS
193 Global Latitude/Longitude 0.25 deg Resolution


Ni 1440
Nj 721
La1 90.000N
Lo1 0.0E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 90.000S
Lo2 359.750E=0.250W
Di 0.250 degrees
Dj 0.250 degrees
Scanning Mode (bits 1 2 3) 00000000(NB: matrix style)


Top of Page



VALUE  GRID DESCRIPTIONS
194 Grid over - Puerto Rico (Mercator)
(Grid for NAM 3 km Puert Rico nest)


Ni 544
Nj 310
La1 15.000N
Lo1 284.500E = 75.500W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 22.005N
Lo2 62.509W
Latin 20.000N
Scanning Mode (bits 1 2 3) 0 1 0
Di 2.500 km
Dj 2.500 km


Top of Page



VALUE  GRID DESCRIPTIONS
195 Grid over - Puerto Rico (Mercator)
(Used by RTMA and NAM smartinit output for NDFD grids)


Ni 177
Nj 129
La1 16.829N
Lo1 291.805E = 68.196W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 19.747N
Lo2 63.972W
Latin 20.000N
Scanning Mode (bits 1 2 3) 0 1 0
Di 2.500 km
Dj 2.500 km


Top of Page





VALUE  GRID DESCRIPTIONS
196 Grid over - Hawaii (Mercator)
(Used by RTMA and NAM smartinit output for NDFD grids)


Ni 321
Nj 225
La1 18.073N
Lo1 198.475E = 161.525W
Res. & Comp. Flag 1 0 0 0 1 0 0 0
La2 23.088N
Lo2 153.869W
Latin 20.000N
Scanning Mode (bits 1 2 3) 0 1 0
Di 2.500 km
Dj 2.500 km


Top of Page




VALUE GRID DESCRIPTIONS
197  Grid over the contiguous United States - 16X Resolution (5 km) (Used by the Radar Stage IV precipitation analyses and Satellite-derived Precipitation Estimates and NAM DNG grids and RTMA NDFD grids) (Lambert Conformal)


Nx 1073
Ny 689
La1 20.192N
Lo1 238.450E = 121.550W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 5.079 km
Dy 5.079 km
Projection Flag (bit 1) 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 238.445999, 20.191923
(1,689) 229.896572, 49.939672
(1073,689) 299.114481, 50.105490
(1073,1) 290.791877, 20.331690


Top of Page



VALUE GRID DESCRIPTIONS
198 Grid over Alaska (Polar Stereographic)
(Used by RTMA and NAM smartinit output for NDFD grids)

Nx 825
Ny 553
La1 40.530N
Lo1 181.429E = 178.571W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 210.000E = 150.000W
Dx 5.953 km
Dy 5.953 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 40.5301N, 178.5710W
(1,533) 61.3989N, 209.8080W
(825,553) 63.9757N, 93.6918W
(825,1) 41.7390N, 124.5816W
Pole point
(I,J) (441.0107, 809.0096)


Top of Page




VALUE  GRID DESCRIPTIONS
199 Grid over - Guam (Mercator)
(Used by RTMA and GFS smartinit output for NDFD grids)


Ni 193
Nj 193
La1 12.350N
Lo1 143.687E = 216.313W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 16.794N
Lo2 148.280E = 211.720W
Latin 20.000N
Scanning Mode (bits 1 2 3) 0 1 0
Di 2.500 km
Dj 2.500 km


Top of Page



 STORAGE AND TRANSMISSION GRIDS

Note: The following grids are intended for use in the U.S. Weather Service's Advanced Weather Information Processing System (AWIPS). Their definition is subject to change as the AWIPS requirements are further refined. The parenthetical letters adjacent to the numeric values are the WMO header identification of the grid for headers starting with "Y" or "Z". For headers starting with "O", the bracketed letter is the WMO header identification for oceanographic grids. See appendix A.



VALUE  GRID DESCRIPTIONS
200 Puerto Rico FAA Regional Grid
Double resolution - 16.232 km (Lambert Conformal)


Nx 108
Ny 94
La1 16.201N
Lo1 285.720E = 74.280W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 253.000E = 107.000W
Dx 16.232 km
Dy 16.232 km
Projection Flag 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 50.000N
Latin 2 50.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 16.201N, 74.280W
(1,47) 26.884N, 68.346W
(54,47) 18.946N, 55.797W
(54,1) 9.844N, 62.760W
Pole point
(I,J) (-120.486, 260.767)


Top of Page



VALUE  GRID DESCRIPTIONS
201 (A) Northern Hemispheric (Polar Stereographic)


Nx 65
Ny 65
La1 -20.826N = 20.826S
Lo1 210.000E = 150.000W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 255.000E = 105.000W
Dx 381.000 km
Dy 381.000 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Pole point
(I,J) (33, 33)


Note: Map 201 is the same as NCEP storage grid 27, except it is rotated to 105 deg. orientation.


Top of Page



VALUE  GRID DESCRIPTIONS
202 (I) National - CONUS (Polar Stereographic)


Nx 65
Ny 43
La1 7.838N
Lo1 218.972E = 141.028W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 255.000E = 105.000W
Dx 190.500 km
Dy 190.500 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 7.838N, 141.028W
(1,43) 35.616N, 168.577E
(65,43) 35.617N, 18.576W
(65,1) 7.838N, 68.973W
Pole point
(I,J) (33, 45)


Top of Page



VALUE  GRID DESCRIPTIONS
203 (J) National - Alaska (Polar Stereographic)


Nx 45
Ny 39
La1 19.132N
Lo1 174.163E = 185.837W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 210.000E = 150.000W
Dx 190.500 km
Dy 190.500 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 19.132N, 174.163E
(1,39) 44.646N, 115.601E
(45,39) 57.634N, 53.660W
(45,1) 24.361N, 123.434W
Pole point
(I,J) (27, 37)


Top of Page



VALUE  GRID DESCRIPTIONS
204 (K) National - Hawaii (Mercator)


Ni 93
Nj 68
La1 25.000S
Lo1 110.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 60.644N
Lo2 109.129W
Latin 20.000
Scanning Mode (bits 1 2 3) 0 1 0
Di 160.000 km
Dj 160.000 km
Lat/Lon values of the corners of the grid
(1,1) 25.000S, 110.000E
(1,68) 60.644N, 110.000E
(93,68) 60.644N, 109.129W
(93,1) 25.000S, 109.129W


The longitudinal grid spacing is 1.531 degrees.


Top of Page



VALUE  GRID DESCRIPTIONS
205 (L) National - Puerto Rico (Polar Stereographic)


Nx 45
Ny 39
La1 0.616N
Lo1 275.096E = 84.904W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 300.000E = 60.000W
Dx 190.500 km
Dy 190.500 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 0.616N, 84.904W
(1,39) 36.257N, 115.304W
(45,39) 45.620N, 15.000W
(45,1) 3.389N, 42.181W
Pole point
(I,J) (27, 57)


Top of Page



VALUE  GRID DESCRIPTIONS
206 Regional - Central US MARD (Lambert Conformal)


Nx 51
Ny 41
La1 22.289N
Lo1 242.009E = 117.991W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 81.2705 km
Dy 81.2705 km
Projection Flag 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 22.289N, 117.991W
(1,41) 50.081N, 124.898W
(51,41) 51.072N, 73.182W
(51,1) 23.142N, 78.275W
Pole point
(I,J) (30.000, 169.745)


The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 80.000 km at 35 deg north; the intersection of 35N & 95W falls on point (30,16).


Top of Page



VALUE  GRID DESCRIPTIONS
207 (N) Regional - Alaska (Polar Stereographic)


Nx 49
Ny 35
La1 42.085N
Lo1 184.359E = 175.641W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 210.000E = 150.000W
Dx 95.250 km
Dy 95.250 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 42.085N, 175.641W
(1,35) 63.976N, 153.689E
(49,35) 63.976N, 93.689W
(49,1) 42.085N, 124.359W
Pole point
(I,J) (25, 51)


Top of Page



VALUE  GRID DESCRIPTIONS
208 (O) Regional - Hawaii (Mercator)


Ni 29
Nj 27
La1 9.343N
Lo1 192.685E = 167.315W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 28.092N
Lo2 145.878W
Latin 20.000
Scanning Mode (bits 1 2 3) 0 1 0
Di 80.000 km
Dj 80.000 km
Lat/Lon values of the corners of the grid
(1,1) 9.343N, 167.315W
(1,27) 28.092N, 167.315W
(29,27) 28.092N, 145.878W
(29,1) 9.343N, 145.878W


The longitudinal grid spacing is 0.766 degrees. The grid is positioned such that the odd-numbered rows and columns coincide with the National grid, No. 204; the lower left corner of the regional grid is located at National (204) grid-point (55,24) and the upper right corner is located at (69,37).


Top of Page



VALUE  GRID DESCRIPTIONS
209 Regional - NOAMIM - Intermediate Resolution North American Master Grid (Lambert Conformal)


Nx 275
Ny 223
La1 4.850S
Lo1 208.900E = 151.100W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 249.000E = 111.000W
Dx 44.00000 km
Dy 44.00000 km
Projection Flag 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 45.000N
Latin2 45.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 4.850S, 151.100W
(1,223) 47.094N, 139.472E
(275,223) 46.455N, 1.266W
(275,1) 5.072S, 70.490W
Pole point
(I,J) (137.173, 253.319)


The intersection of 45N & 111W falls on point (137.173, 108.195).


Top of Page



VALUE  GRID DESCRIPTIONS
210 Regional - Puerto Rico (Mercator)


Ni 25
Nj 25
La1 9.000N
Lo1 283.000E = 77.000W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 26.422N
Lo2 58.625W
Latin 20.000
Scanning Mode (bits 1 2 3) 0 1 0
Di 80.000 km
Dj 80.000 km
Lat/Lon values of the corners of the grid
(1,1) 9.000N, 77.000W
(1,25) 26.422N, 77.000W
(25,25) 26.422N, 58.625W
(25,1) 9.000N, 58.626W


The longitudinal grid spacing is 0.766 degrees.


Top of Page



VALUE  GRID DESCRIPTIONS
211 (Q) Regional - CONUS (Lambert Conformal)


Nx 93
Ny 65
La1 12.190N
Lo1 226.541E = 133.459W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 81.2705 km
Dy 81.2705 km
Projection Flag 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 12.190N, 133.459W
(1,65) 54.536N, 152.856W
(93,65) 57.290N, 49.385W
(93,1) 14.335N, 65.091W
Pole point
(I,J) (53.000, 178.745)


The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 80.000 km at 35 deg north; the intersection of 35N & 95W falls on point (53,25).


Top of Page



VALUE  GRID DESCRIPTIONS
212 (R)[R] Regional - CONUS - Double Resolution (Lambert Conformal)


Nx 185
Ny 129
La1 12.190N
Lo1 226.541E = 133.459W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 40.63525 km
Dy 40.63525 km
Projection Flag 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 12.190N, 133.459W
(1,129) 54.536N, 152.856W
(185,129) 57.290N, 49.385W
(185,1) 14.335N, 65.091W
Pole point
(I,J) (105.000, 356.490)


The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 40.000 km at 35 deg north; the intersection of 35N & 95W falls on point (105,49).


Top of Page



VALUE  GRID DESCRIPTIONS
213 (H) National - CONUS - Double Resolution (Polar Stereographic)


Nx 129
Ny 85
La1 7.838N
Lo1 218.972E = 141.028W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 255.000 = 105.000W
Dx 95.250 km
Dy 95.250 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 7.838N, 141.028W
(1,85) 35.617N, 168.577E
(129,85) 35.617N, 18.577W
(129,1) 7.838N, 68.973W
Pole point
(I,J) (65, 89)


Top of Page



VALUE  GRID DESCRIPTIONS
214 ()[T] Regional - Alaska - Double Resolution (Polar Stereographic)


Nx 97
Ny 69
La1 42.085N
Lo1 184.359E = 175.641W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 210.000E = 150.000W
Dx 47.625 km
Dy 47.625 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 42.085N, 175.641W
(1,69) 63.975N, 153.690E
(97,69) 63.975N, 93.689W
(97,1) 42.085N, 124.358W
Pole point
(I,J) (49, 101)


Top of Page



VALUE  GRID DESCRIPTIONS
215 (U)[U]  grid over the contiguous United States - Quadruple Resolution (used by the 29-km NAM model)(Lambert Conformal)


Nx 369
Ny 257
La1 12.190N
Lo1 226.514E = 133.459W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 20.317625 km
Dy 20.317625 km
Projection Flag 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 12.190N, 133.459W
(1,257) 54.536N, 152.856W
(369,257) 57.290N, 49.385W
(369,1) 14.335N, 65.091W
Pole point
(I,J) (209.000, 711.980)


The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 20.000 km at 35 deg north; the intersection of 35N & 95W falls on point (209,97).


Top of Page



VALUE  GRID DESCRIPTIONS
216 (V)[V]  grid over Alaska (Polar Stereographic)


Nx 139
Ny 107
La1 30.000N
Lo1 187.000E = 173.000W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 225.000E = 135.000W
Dx 45.000 km
Dy 45.000 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 30.000N, 173.000W
(1,107) 50.454N, 143.597E
(139,107) 70.111N, 62.850W
(139,1) 38.290N, 114.856W
Pole point
(I,J) (94.909, 121.198)


Top of Page



VALUE  GRID DESCRIPTIONS
217 (Y)  Grid over Alaska - Double Resolution grid (Polar Stereographic)


Nx 277
Ny 213
La1 30.000N
Lo1 187.000E = 173.000W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 225.000E = 135.000W
Dx 22.500 km
Dy 22.500 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 30.000N, 173.000W
(1,213) 50.454N, 143.597E
(277,213) 70.111N, 62.850W
(277,1) 38.290N, 114.856W
Pole point
(I,J) (188.818, 241.397)


Top of Page



VALUE  GRID DESCRIPTIONS
218 (B)[B]   Grid over the Contiguous United States (used by the 12-km NAM Model) (Lambert Conformal)


Nx 614
Ny 428
La1 12.190N
Lo1 226.514E = 133.459W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 12.19058 km
Dy 12.19058 km
Projection Flag (bit 1) 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 12.190N, 133.459W
(1,428) 54.564N, 152.878W
(614,428) 57.328N, 49.420W
(614,1) 14.342N, 65.127W
Pole point
(I,J) (347.668, 1190.097)


The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 12.000 km at 35 deg north; the intersection of 35N & 95W falls on point (347.668, 160.999)


Top of Page



VALUE  GRID DESCRIPTIONS
219 ()[C]  grid over the Northern Hemisphere to depict SSMI-derived ice concentrations (Polar Stereographics)


Nx 385
Ny 465
La1 25.032N
Lo1 240.440E = 119.560W
Res. & Comp. Flag 0 0 0 0 0 0 0 0
Lov 280.000E = 80.000W
Dx 25.4 km at 60N
Dy 25.4 km at 60N
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 25.032N, 119.560W
(1,465) 24.468N, 139.075E
(385,465) 24.028N, 60.339E
(385,1) 24.561N, 39.853W
Pole point
(I,J) (191.000, 231.000)


Top of Page



VALUE  GRID DESCRIPTIONS
220 ()[D]  grid over the Southern Hemisphere to depict SSMI-derived ice concentrations (Polar Stereographics)


Nx 345
Ny 355
La1 36.866S
Lo1 139.806E = 220.194W
Res. & Comp. Flag 0 0 0 0 0 0 0 0
Lov 100.000E = 260.000W
Dx 25.4 km at 60S
Dy 25.4 km at 60S
Projection Flag (bit 1) 1
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 36.866S, 139.806E
(1,355) 37.801S, 120.763W
(345,355) 31.850S, 31.899W
(345,1) 31.094S, 52.857E
Pole point
(I,J) (151.000, 181.000)


Top of Page



VALUE  GRID DESCRIPTIONS
221 ()[E] Regional North American Grid (Lambert Conformal)
used by NAM, SREF and RAP.

Nx 349
Ny 277
La1 1.000N
Lo1 214.500E = 145.500W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 253.000E = 107.000W
Dx 32.46341 km
Dy 32.46341 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 50.000N
Latin2 50.000N
Lat/Lon values of the corners of the grid
(1,1) 1.000N, 145.500W
(1,277) 46.635N, 148.639E
(349,277) 46.352N, 2.566W
(349,1) 0.897N, 68.318W
Pole point
(I,J) (174.507, 307.764)


The Dx, Dy grid increment (at 50 deg north) was selected so that the grid spacing would be exactly 32.000 km at 40 deg north; the intersection of 40N & 107W falls on point (174.507,108.664)


Top of Page



VALUE  GRID DESCRIPTIONS
222 Regional - NOAMLO - Low Resolution North American Master Grid (Lambert Conformal)


Nx 138
Ny 112
La1 -4.850N = 4.850S
Lo1 208.900E = 151.100W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 249.000E = 111.000W
Dx 88.00000 km
Dy 88.00000 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 45.000N
Latin2 45.000N
Lat/Lon values of the corners of the grid
(1,1) 4.850S, 151.100W
(1,112) 47.094N, 139.472E
(138,112) 46.455N, 1.266W
(138,1) 5.072S, 70.490W
Pole point
(I,J) (69.086, 127.160)


Top of Page



VALUE  GRID DESCRIPTIONS
223 Hemispheric - Double Resolution (Lambert Conformal)


Nx 129
Ny 129
La1 -20.826N = 20.826S
Lo1 210.000E = 150.000W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 255.000E = 105.000W
Dx 190.500 km
Dy 190.500 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Pole point
(I,J) (65.000, 65.000)


Top of Page



VALUE  GRID DESCRIPTIONS
224 Southern Hemispheric (Polar Stereographic)


Nx 65
Ny 65
La1 20.826N
Lo1 120.000E
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 105.000W
Dx 381.000 km
Dy 381.000 km
Projection Flag (bit 1) 1
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 20.826N, 120.000E
(1,65) 20.826N, 150.000W
(65,65) 20.826N, 60.000W
(65,1) 20.826N, 30.000E
Pole point
(I,J) (33, 33)


Top of Page



VALUE  GRID DESCRIPTIONS
225 National Double Resolution - Hawaii (Mercator)


Ni 185
Nj 135
La1 25.000S
Lo1 110.000E = 250.000W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 60.64N
Lo2 109.129W = 250.871E
Latin 20.000
Scanning Mode (bits 1 2 3) 0 1 0
Di 80.000 km
Dj 80.000 km
Lat/Lon values of the corners of the grid
(1,1) 25.000S, 110.000E
(1,68) 60.644N, 110.000E
(93,68) 60.644N, 109.129W
(93,1) 25.000S, 109.129W


Top of Page



VALUE  GRID DESCRIPTIONS
226 (M)  grid over the contiguous United States - 8X Resolution (10 km) (Used by the Radar mosaics) (Lambert Conformal)


Nx 737
Ny 517
La1 12.190N
Lo1 226.514E = 133.459W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 10.1588125 km
Dy 10.1588125 km
Projection Flag (bit 1) 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 12.190N, 133.459W
(1,129) 54.536N, 152.856W
(185,129) 57.290N, 49.385W
(185,1) 14.335N, 65.091W
Pole point
(I,J) (209.000, 711.980)




Top of Page



VALUE  GRID DESCRIPTIONS
227  Regional grid over the contiguous United States - 16X Resolution
(5 km - Lambert Conformal)
(Used for Smoke and Dust system output products)


Nx 1473
Ny 1025
La1 12.190N
Lo1 226.514E = 133.459W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 5.079 km
Dy 5.079 km
Projection Flag (bit 1) 0 (not biPolar)
Scanning Mode (bits 1 2 3) 0 1 0
Latin1 25.000N
Latin2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 12.190N, 133.459W
(1,129) 54.536N, 152.856W
(185,129) 57.290N, 49.385W
(185,1) 14.335N, 65.091W
Pole point
(I,J) (209.000, 711.980)




Top of Page



VALUE  GRID DESCRIPTIONS
228 ()[A]  Global (longitude/latitude grid)


Ni 144
Nj 73
La1 90.000N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 90.000S
Lo2 357.500E = 2.500W
Di 2.500 degrees
Dj 2.500 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 90.000N, 0.000E
(1,73) 90.000S, 0.000E
(144,73) 90.000S, 359.000E
(144,1) 90.000N, 359.000E


Top of Page



VALUE  GRID DESCRIPTIONS
229 ()[F]  Global (longitude/latitude grid)


Ni 360
Nj 181
La1 90.000N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 90.000S
Lo2 359.000E = 1.000W
Di 1.000 degrees
Dj 1.000 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 90.000N, 0.000E
(1,181) 90.000S, 0.000E
(360,181) 90.000S, 359.000E
(360,1) 90.000N, 359.000E


Top of Page



VALUE  GRID DESCRIPTIONS
230 ()[G]  Global (longitude/latitude grid)


Ni 720
Nj 361
La1 90.000N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 90.000S
Lo2 359.500E = 0.500W
Di 0.5000 degrees
Dj 0.500 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 90.000N, 0.000E
(1,361) 90.000S, 0.000E
(720,361) 90.000S, 359.000E
(720,1) 90.000N, 359.000E


Top of Page



VALUE  GRID DESCRIPTIONS
231 ()[H]  Northern Hemisphere (longitude/latitude grid)


Ni 720
Nj 181
La1 0.000N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 90.000N
Lo2 359.500E = 0.500W
Di 0.5000 degrees
Dj 0.500 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 0.000N, 0.000E
(1,181) 90.000N, 0.000E
(720,181) 90.000N, 359.000E
(720,1) 0.000N, 359.000E


Top of Page



VALUE  GRID DESCRIPTIONS
232 ()[I]  Northern Hemisphere (longitude/latitude grid)


Ni 360
Nj 91
La1 0.000N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 90.000N
Lo2 359.000E = 1.000W
Di 1.000 degrees
Dj 1.000 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 0.000N, 0.000E
(1,91) 90.000N, 0.000E
(360,91) 90.000N, 359.000E
(360,1) 0.000N, 359.000E


Top of Page



VALUE  GRID DESCRIPTIONS
233 ()[J]  Regional (longitude/latitude grid)


Ni 288
Nj 157
La1 78.000N
Lo1 0.000E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 78.000S
Lo2 358.750E = 1.250W
Di 1.250 degrees
Dj 1.000 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 90.000N, 0.000E
(1,73) 90.000S, 0.000E
(144,73) 90.000S, 359.000E
(144,1) 90.000N, 359.000E


Top of Page



VALUE  GRID DESCRIPTIONS
234 ()[K]  Regional (longitude/latitude grid)


Ni 133
Nj 121
La1 15.000N
Lo1 262.000E = 98.000W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 45.000S
Lo2 295.000E = 65.000W
Di 0.250 degrees
Dj 0.250 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 15.000N, 262.000E
(1,73) 15.000S, 295.000E
(144,73) 45.000S, 295.000E
(144,1) 90.000N, 262.000E


Top of Page



VALUE  GRID DESCRIPTIONS
235 ()[L]  Global (longitude/latitude grid)


Ni 720
Nj 360
La1 89.750N
Lo1 0.250E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 89.750S
Lo2 359.750E = 0.250W
Di 0.5000 degrees
Dj 0.500 degrees
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 89.750N, 0.250E
(1,360) 89.750S, 0.250E
(720,360) 89.750S, 359.750E
(720,1) 89.750N, 359.750E


Top of Page



VALUE  GRID DESCRIPTIONS
236 (W) Regional - CONUS (Lambert Conformal)


Nx 151
Ny 113
La1 16.281N
Lo1 233.862E = 126.138W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 40.63525 km
Dy 40.63525 km
Projection Flag 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 25.000N
Latin 2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 16.281N, 126.138W
(1,113) 54.173N, 139.856W
(151,113) 55.481N, 57.381W
(151,1) 17.340N, 69.038W
Pole point
(I,J) (83.000, 351.730)


The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 40.000 km at 35 deg north; the intersection of 35N & 95W falls on point (83, 43).


Top of Page



VALUE  GRID DESCRIPTIONS
237 (P) Puerto Rico FAA Regional Grid (Lambert Conformal)


Nx 54
Ny 47
La1 16.201N
Lo1 285.720E = 74.280W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 253.000E = 107.000W
Dx 32.46341 km
Dy 32.46341 km
Projection Flag 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 50.000N
Latin 2 50.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 16.201N, 74.280W
(1,47) 26.884N, 68.346W
(54,47) 18.946N, 55.797W
(54,1) 9.844N, 62.760W
Pole point
(I,J) (-120.486, 260.767)


Top of Page



VALUE  GRID DESCRIPTIONS
238 ()(M)  Western North Atlantic (longitude/latitude grid)


Ni 275
Nj 203
La1 50.250N
Lo1 261.750E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 0.250S
Lo2 330.250E = 29.750W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 50.250N, 261.750E
(1,203) 0.250S, 261.750E
(275,203) 0.250S, 330.250E
(275,1) 50.250N, 330.250E


Top of Page



VALUE  GRID DESCRIPTIONS
239 ()(N)  Alaska Regional (longitude/latitude grid)


Ni 155
Nj 123
La1 75.250N
Lo1 159.500E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 44.750N
Lo2 236.500E = 123.500W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 75.250N, 159.500E
(1,123) 44.750N, 159.500E
(155,123) 44.750N, 236.500E
(155,1) 75.250N, 236.500E


Top of Page



VALUE  GRID DESCRIPTIONS
240 () HRAP Grid over the Contiguous United States and Puerto Rico (Polar Stereographic)


Nx 1121
Ny 881
La1 23.098N
Lo1 240.964E = 119.036W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 255.000E = 105.000W
Dx 4.7625 km
Dy 4.7625 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 23.098N, 119.036W
(1,881) 53.480N, 134.055W
(1121,881) 45.620N, 60.000W
(1121,1) 19.798N, 80.772W
Pole point
(I,J) (401.000, 1601.000)


Top of Page



VALUE  GRID DESCRIPTIONS
241 () Regional - NOAMHI - High Resolution North American Grid (Lambert Conformal)


Nx 549
Ny 445
La1 -4.850N = 4.850S
Lo1 208.900E = 151.100W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 249.000E = 111.000W
Dx 22.00000 km
Dy 22.00000 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 45.000N
Latin 2 45.000N
Lat/Lon values of the corners of the grid
(1,1) 4.850S, 151.100W
(1,445) 47.094N, 139.472E
(549,445) 46.455N, 1.266W
(549,1) 5.072S, 70.490W
Pole point
(I,J) (273.346, 505.638)


The intersection of 45N & 111W is at (273.346, 216.039).


Top of Page



VALUE  GRID DESCRIPTIONS
242 (S)  Grid over Alaska - Quadruple Resolution Grid (Polar Stereographic)


Nx 553
Ny 425
La1 30.000N
Lo1 187.000E = 173.000W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 225.000E = 135.000W
Dx 11.25 km
Dy 11.25 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 30.000N, 173.000W
(1,425) 50.454N, 143.597E
(553,425) 70.111N, 62.850W
(553,1) 38.290N, 114.856W
Pole point
(I,J) (375.636, 481.792)


Top of Page



VALUE  GRID DESCRIPTIONS
243 ()  Eastern North Pacific (longitude/latitude grid)


Ni 126
Nj 101
La1 10.000N
Lo1 190.000E = 170.000W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 50.000N
Lo2 240.000E = 120.000W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 10.000N, 190.000E
(1,101) 50.000N, 190.000E
(126,101) 50.000N, 240.000E
(126,1) 10.000N, 240.000E


Top of Page



VALUE  GRID DESCRIPTIONS
244 ()(O)  North Atlantic Hurricane (longitude/latitude grid)


Ni 275
Nj 203
La1 50.250N
Lo1 261.750E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 0.250S
Lo2 330.250E = 29.750W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 50.250N, 261.750E
(1,203) 0.250S, 261.750E
(275,203) 0.250S, 330.250E
(275,1) 50.250N, 330.250E


Top of Page



VALUE  GRID DESCRIPTIONS
245 () Regional - NOAMHI - High Resolution over Eastern US (Lambert Conformal for 8 km NMM)


Nx 336
Ny 372
La1 22.980N
Lo1 267.160E = 92.840W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 280.000E = 80.000W
Dx 8.00000 km
Dy 8.00000 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 35.000N
Latin 2 35.000N
Lat/Lon values of the corners of the grid
(1,1) 22.980N, 92.840W
(1,372) 49.125N, 97.902W
(336,372) 49.122N, 62.070W
(336,1) 22.977N, 67.139W
Pole point
(I,J) (168.191, 1295.480)


The intersection of 35N & 80W is at (168.365, 158.501).


Top of Page



VALUE  GRID DESCRIPTIONS
246 () Regional - NOAMHI - High Resolution over Western US (Lambert Conformal for 8 km NMM)


Nx 332
Ny 371
La1 25.970N
Lo1 232.027E = 127.973W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 245.000E = 115.000W
Dx 8.00000 km
Dy 8.00000 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 40.000N
Latin 2 40.000N
Lat/Lon values of the corners of the grid
(1,1) 25.970N, 127.973W
(1,371) 51.947N, 134.096W
(332,371) 51.968N, 96.061W
(332,1) 25.984N, 102.135W
Pole point
(I,J) (167.203, 1134.746)


The intersection of 40N & 115W is at (167.203, 185.784).


Top of Page



VALUE  GRID DESCRIPTIONS
247 () Regional - NOAMHI - High Resolution over Central US (Lambert Conformal for 8 km NMM)


Nx 336
Ny 372
La1 22.980N
Lo1 249.160E = 110.840W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 262.000E = 98.000W
Dx 8.00000 km
Dy 8.00000 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 35.000N
Latin 2 35.000N
Lat/Lon values of the corners of the grid
(1,1) 22.980N, 110.840W
(1,372) 49.125N, 115.902W
(336,372) 49.122N, 80.070W
(336,1) 22.977N, 85.139W
Pole point
(I,J) (168.364, 1295.444)


The intersection of 35N & 98W is at (168.365, 158.501).


Top of Page



VALUE  GRID DESCRIPTIONS
248 ()  Puerto Rico (longitude/latitude grid)


Ni 135
Nj 101
La1 14.500N
Lo1 288.500E = 71.500W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 22.000N
Lo2 298.65E = 61.45W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 14.500N, 288.500E
(1,101) 22.000N, 288.500E
(135,101) 22.000N, 298.650E
(135,1) 14.500N, 298.600E


Top of Page



VALUE  GRID DESCRIPTIONS
249 ()  Grid over Alaska for 10-km Alaska nest (Polar Stereographic)


Nx 367
Ny 343
La1 45.400N
Lo1 188.400E = 171.600W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 210.000E = 150.000W
Dx 9.86789 km
Dy 9.86789 km
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0
Lat/Lon values of the corners of the grid
(1,1) 45.400N, 171.600W
(1,343) 69.625N, 152.845E
(367,343) 69.454N, 92.531W
(367,1) 45.334N, 128.163W
Pole point
(I,J) (182.889, 460.425)


Top of Page



VALUE  GRID DESCRIPTIONS
250 (D)  Grid over Hawaii for 8 km NMM and TPC TCM product (longitude/latitude grid)


Ni 135
Nj 101
La1 16.500N
Lo1 198.000E = 162.000W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 24.000N
Lo2 208.050E = 151.950W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 16.500N, 198.000E
(1,101) 24.000N, 198.000E
(135,101) 24.000N, 208.050E
(135,1) 16.500N, 208.050E


Top of Page

VALUE  GRID DESCRIPTIONS
251 ()[P] Coastal Ocean Forecast System Grid - North Atlantic Region (longitude/latitude grid)


Ni 332
Nj 210
La1 26.350N
Lo1 276.950E = 83.050W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 47.250N
Lo2 310.050E = 49.950W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 26.350N, 276.950E
(1,332) 26.350N, 310.050E
(210,332) 47.250N, 310.050E
(210,1) 47.250N, 276.950E


Top of Page

VALUE  GRID DESCRIPTIONS
252 () Regional - CONUS (Lambert Conformal)


Nx 301
Ny 225
La1 16.281N
Lo1 233.862E = 126.138W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 20.317625 km
Dy 20.317625 km
Projection Flag 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 25.000N
Latin 2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 16.281N, 126.138W
(1,225) 54.172N, 139.856W
(301,225) 55.481N, 57.383W
(301,1) 17.340N, 69.039W
Pole point
(I,J) (166.210, 701.026)


Top of Page


VALUE  GRID DESCRIPTIONS
253 ()[S]  Eastern North Pacific Regional (longitude/latitude grid)
(Also used by the North Pacific hurricane wave model)


Ni 373
Nj 224
La1 60.50N
Lo1 189.750E
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 4.750N
Lo2 282.750E = 77.250W
Projection Flag (bit 1) 0
Scanning Mode (bits 1 2 3) 0 0 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) 60.500N, 189.750E
(1,183) 4.750N, 189.750E
(373,183) 4.750N, 282.750E
(373,1) 60.500N, 282.750E


Top of Page


VALUE GRID DESCRIPTIONS
254 [Z] 40 km Mercator grid for Pacific Region

Ni 369
Nj 300
La1 35.000S
Lo1 110.000E = 250.000W
Res. & Comp. Flag 1 0 0 0 0 0 0 0
La2 60.789N
Lo2 109.129W = 250.871E
Latin 20.000
Scanning Mode (bits 1 2 3) 0 1 0
Di 40.000 km
Dj 40.000 km


Top of Page



Office Note 388 - GRIB