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NCEP Home > NCO Home > IDSB > GRIB2 use at NCEP > NCEP GRIB2 Documentation

NCEP WMO GRIB2 Documentation
Version 23.0.0 - May 15, 2019

Please see the disclaimer at the bottom of this page
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* Introduction
Revision History

* Section 0 - Indicator Section
*  Table 0.0 - Discipline of Processed Data

* Section 1 - Identification Section
*  Table 1.0 - GRIB Master Tables Version Number
*  Table 1.1 - GRIB Local Tables Version Number
*  Table 1.2 - Significance of Reference Time
*  Table 1.3 - Production Status of Data
*  Table 1.4 - Type of Data
*  Table 1.5 - Identification Template Number
*  Identification Template 1.0 - Calendar Definition
*  Identification Template 1.1 - Paleontological Offset
*  Identification Template 1.2 - Calendar Definition and Paleontological Offset
*  Table 1.6 - Type of Calendar

* Section 2 - Local Use Section

* Section 3 - Grid Definition Section
*  Table 3.0 - Source of Grid Definition
*  Table 3.1 - Grid Definition Template Number
*  Table 3.2 - Shape of the Reference System
*  Table 3.3 - Resolution and Component Flags
*  Table 3.4 - Scanning Mode
*  Table 3.5 - Projection Center
*  Table 3.6 - Spectral Data Representation Type
*  Table 3.7 - Spectral Data Representation Mode
*  Table 3.8 - Grid Point Position
*  Table 3.9 - Numbering Order of Diamonds
*  Table 3.10 - Scanning Mode for One Diamond
*  Table 3.11 - Interpretation of List of Numbers at end of section 3
*  Table 3.15 - Physical Meaning of Vertical Coordinate
*  Table 3.20 - Type of Horizontal Line
*  Table 3.21 - Vertical Dimension Coordinate Values Definition

* Section 4 - Product Definition Section
*  Table 4.0 - Product Definition Template Number
*  Table 4.1 - Parameter Category by Product Discipline
*  Table 4.2 - Parameter Number by Product Discipline and Parameter Category
*  Table 4.3 - Type of Generating Process
*  Table 4.4 - Indicator of Unit of Time Range
*  Table 4.5 - Fixed Surface Types and Units
*  Table 4.6 - Type of Ensemble Forecast
*  Table 4.7 - Derived Forecast
*  Table 4.8 - Clustering Method
*  Table 4.9 - Probability Type
*  Table 4.10 - Type of Statistical Processing
*  Table 4.11 - Type of Time Intervals
*  Table 4.12 - Operating Mode
*  Table 4.13 - Quality Control Indicator
*  Table 4.14 - Clutter Filter Indicator
*  Table 4.15 - Type of Spatial Processing used to arrive at given
                           data value from the source data
*  Table 4.16 - Quality Value Associated with Parameter
*  Table 4.91 - Type of Interval
*  Table 4.201 - Precipitation Type
*  Table 4.202 - Precipitable Water Category
*  Table 4.203 - Cloud Type
*  Table 4.204 - Thunderstorm Coverage
*  Table 4.205 - Presence of Aerosol
*  Table 4.206 - Volcanic Ash
*  Table 4.207 - Icing
*  Table 4.208 - Turbulence
*  Table 4.209 - Planetary Boundary-Layer Regime
*  Table 4.210 - Contrail Intensity
*  Table 4.211 - Contrail Engine Type
*  Table 4.212 - Land Use
*  Table 4.213 - Soil Type
*  Table 4.215 - Remotely Sensed Snow Coverage
*  Table 4.216 - Elevation of Snow Covered Terrain
*  Table 4.217 - Cloud Mask Type
*  Table 4.218 - Pixel Scene Type
*  Table 4.219 - Cloud Top Height Quality Indicator
*  Table 4.220 - Horizontal Dimension Processed
*  Table 4.221 - Treatment of Missing Data
*  Table 4.222 - Categorical Result
*  Table 4.223 - Fire Detection Indicator
*  Table 4.224 - Categorical Outlook
*  Table 4.225 - Weather
*  Table 4.227 - Icing Scenario (Weather/Cloud Classification)
*  Table 4.230 - Atmospheric Chemical or Physical Type
*  Table 4.233 - Aerosol Type
*  Table 4.234 - Canopy Cover Fraction
*  Table 4.235 - Wave-Generated Wave Spectral Description
*  Table 4.236 - Soil Texture Cover Fraction
*  Table 4.240 - Type of Distribution Function
*  Table 4.241 - Coverage Attributes
*  Table 4.242 - Tile Classification
*  Table 4.243 - Tile Class
*  Table 4.244 - Quality Indicator

* Section 5 - Data Representation Section
*  Table 5.0 - Data Representation Template Number
*  Table 5.1 - Type of Original Field Values
*  Table 5.2 - Matrix Coordinate Value Function Definition
*  Table 5.3 - Matrix Coordinate Parameter
*  Table 5.4 - Group Splitting Method
*  Table 5.5 - Missing Value Management for Complex Packing
*  Table 5.6 - Order of Spatial Differencing
*  Table 5.7 - Precision of Floating Point Numbers
*  Table 5.40 - Type of Compression

* Section 6 - Bit Map Section
*  Table 6.0 - Bit Map Indicator

* Section 7 -  Data Section
*  Table 7.0 - Data Template Number

* Section 8 - End Section

* Appendix A - Outline of WMO Headers Used With GRIB1 and GRIB2

* Appendix B - Outline of WMO Headers for the EPA/CMAQ model
 
* Appendix C - Definition of Commonly used NCEP Grids

Disclaimer:

This web page and the pages it links to are for the use of NOAA employees and their customers to facilitate in the transfer of meteorological data in WMO GRIB2 format.  Nothing in these pages should be considered official.  To obtain official documentation on the WMO GRIB2 data standard, please visit the WMO web site.



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Documentation and Software for NCEP WMO GRIB1 can be found here: GRIB1

Information on NCEP's use of WMO GRIB2 can be found here: GRIB2

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Page last modified: Monday, 10-Jun-2019 19:41:52 UTC