GRIB2 - TABLE 4.2-0-1

PARAMETERS FOR DISCIPLINE 0
CATEGORY 1

(Meteorological products, Moisture category)

In Section 0, Octet 7 = 0
In Section 4, Octet 10 = 1

Revised 06/23/2022
Red text depicts changes made since 04/06/2021



Number
(In Section 4, octet 11)
Parameter Units
Abbrev
0
Specific Humidity
kg kg-1
SPFH
1
Relative Humidity
%
RH
2
Humidity Mixing Ratio
kg kg-1 MIXR
3
Precipitable Water
kg m-2 PWAT
4
Vapour Pressure
Pa
VAPP
5
Saturation Deficit
Pa
SATD
6
Evaporation
kg m-2 EVP
7
Precipitation Rate *
kg m-2 s-1 PRATE
8
Total Precipitation ***
kg m-2 APCP
9
Large-Scale Precipitation (non-convective) *** kg m-2 NCPCP
10
Convective Precipitation *** kg m-2 ACPCP
11
Snow Depth
m
SNOD
12
Snowfall Rate Water Equivalent *
kg m-2 s-1 SRWEQ
13
Water Equivalent of Accumulated Snow Depth ***
kg m-2 WEASD
14
Convective Snow ***
kg m-2 SNOC
15
Large-Scale Snow ***
kg m-2 SNOL
16
Snow Melt
kg m-2 SNOM
17
Snow Age
day
SNOAG
18
Absolute Humidity
kg m-3 ABSH
19
Precipitation Type
See Table 4.201
PTYPE
20
Integrated Liquid Water
kg m-2 ILIQW
21
Condensate
kg kg-1 TCOND
22
Cloud Mixing Ratio
kg kg-1 CLMR
23
Ice Water Mixing Ratio kg kg-1 ICMR
24
Rain Mixing Ratio kg kg-1 RWMR
25
Snow Mixing Ratio kg kg-1 SNMR
26
Horizontal Moisture Convergence
kg kg-1 s-1 MCONV
27
Maximum Relative Humidity *
%
MAXRH
28
Maximum Absolute Humidity * kg m-3 MAXAH
29
Total Snowfall ***
m
ASNOW
30
Precipitable Water Category
See Table 4.202 PWCAT
31
Hail
m
HAIL
32
Graupel
kg kg-1 GRLE
33
Categorical Rain Code table 4.222
CRAIN
34
Categorical Freezing Rain Code table 4.222
CFRZR
35
Categorical Ice Pellets Code table 4.222 CICEP
36
Categorical Snow Code table 4.222 CSNOW
37
Convective Precipitation Rate kg m-2 s-1 CPRAT
38
Horizontal Moisture Divergence kg kg-1 s-1 MDIVER
39 Percent frozen precipitation % CPOFP
40
Potential Evaporation kg m-2 PEVAP
41
Potential Evaporation Rate W m-2 PEVPR
42
Snow Cover %
SNOWC
43 Rain Fraction of Total Cloud Water Proportion FRAIN
44
Rime Factor Numeric RIME
45
Total Column Integrated Rain kg m-2 TCOLR
46
Total Column Integrated Snow kg m-2 TCOLS
47
Large Scale Water Precipitation (Non-Convective) *** kg m-2 LSWP
48
Convective Water Precipitation *** kg m-2 CWP
49
Total Water Precipitation *** kg m-2 TWATP
50
Total Snow Precipitation *** kg m-2 TSNOWP
51
Total Column Water
(Vertically integrated total water (vapour+cloud water/ice)
kg m-2 TCWAT
52
Total Precipitation Rate ** kg m-2 s-1 TPRATE
53
Total Snowfall Rate Water Equivalent ** kg m-2 s-1 TSRWE
54
Large Scale Precipitation Rate kg m-2 s-1 LSPRATE
55
Convective Snowfall Rate Water Equivalent kg m-2 s-1 CSRWE
56
Large Scale Snowfall Rate Water Equivalent kg m-2 s-1 LSSRWE
57
Total Snowfall Rate m s-1 TSRATE
58
Convective Snowfall Rate m s-1 CSRATE
59
Large Scale Snowfall Rate m s-1 LSSRATE
60
Snow Depth Water Equivalent kg m-2 SDWE
61
Snow Density kg m-3 SDEN
62
Snow Evaporation kg m-2 SEVAP
63
Reserved

64
Total Column Integrated Water Vapour kg m-2 TCIWV
65
Rain Precipitation Rate kg m-2 s-1 RPRATE
66
Snow Precipitation Rate kg m-2 s-1 SPRATE
67
Freezing Rain Precipitation Rate kg m-2 s-1 FPRATE
68
Ice Pellets Precipitation Rate kg m-2 s-1 IPRATE
69
Total Column Integrate Cloud Water kg m-2 TCOLW
70
Total Column Integrate Cloud Ice kg m-2 TCOLI
71
Hail Mixing Ratio kg kg-1 HAILMXR
72
Total Column Integrate Hail kg m-2 TCOLH
73
Hail Prepitation Rate kg m-2 s-1 HAILPR
74
Total Column Integrate Graupel kg m-2 TCOLG
75
Graupel (Snow Pellets) Prepitation Rate kg m-2 s-1 GPRATE
76
Convective Rain Rate kg m-2 s-1 CRRATE
77
Large Scale Rain Rate kg m-2 s-1 LSRRATE
78
Total Column Integrate Water (All
components including precipitation)
kg m-2 TCOLWA
79
Evaporation Rate kg m-2 s-1 EVARATE
80
Total Condensate kg kg-1 TOTCON
81
Total Column-Integrate Condensate kg m-2 TCICON
82
Cloud Ice Mixing Ratio kg kg-1 CIMIXR
83
Specific Cloud Liquid Water Content kg kg-1 SCLLWC
84
Specific Cloud Ice Water Content kg kg-1 SCLIWC
85
Specific Rain Water Content kg kg-1 SRAINW
86
Specific Snow Water Content kg kg-1 SSNOWW
87 Stratiform Precipitation Rate kg m-2 s-1 STRPRATE
88 Categorical Convective Precipitation Code table 4.222 CATCP
89
Reserved

90
Total Kinematic Moisture Flux kg kg-1 m s-1 TKMFLX
91
U-component (zonal) Kinematic Moisture Flux kg kg-1 m s-1 UKMFLX
92
V-component (meridional) Kinematic Moisture Flux kg kg-1 m s-1 VKMFLX
93 Relative Humidity With Respect to Water % RHWATER
94 Relative Humidity With Respect to Ice % RHICE
95 Freezing or Frozen Precipitation Rate kg m-2 s-1 FZPRATE
96 Mass Density of Rain kg m-3 MASSDR
97 Mass Density of Snow kg m-3 MASSDS
98 Mass Density of Graupel kg m-3 MASSDG
99 Mass Density of Hail kg m-3 MASSDH
100 Specific Number Concentration of Rain kg-1 SPNCR
101 Specific Number Concentration of Snow kg-1 SPNCS
102 Specific Number Concentration of Graupel kg-1 SPNCG
103 Specific Number Concentration of Hail kg-1 SPNCH
104 Number Density of Rain m-3 NUMDR
105 Number Density of Snow m-3 NUMDS
106 Number Density of Graupel m-3 NUMDG
107 Number Density of Hail m-3 NUMDH
108 Specific Humidity Tendency due to Parameterizations kg kg-1 s-1 SHTPRM
109 Mass Density of Liquid Water Coating on Hail Expressed as Mass of Liquid Water per Unit Volume of Air kg m-3 MDLWHVA
110 Specific Mass of Liquid Water Coating on Hail Expressed as Mass of Liquid Water per Unit Mass of Moist Air kg kg-1 SMLWHMA
111 Mass Mixing Ratio of Liquid Water Coating on Hail Expressed as Mass of Liquid Water per Unit Mass of Dry Air kg kg-1 MMLWHDA
112 Mass Density of Liquid Water Coating on Graupel Expressed as Mass of Liquid Water per Unit Volume of Air kg m-3 MDLWGVA
113 Specific Mass of Liquid Water Coating on Graupel Expressed as Mass of Liquid Water per Unit Mass of Moist Air kg kg-1 SMLWGMA
114 Mass Mixing Ratio of Liquid Water Coating on Graupel Expressed as Mass of Liquid Water per Unit Mass of Dry Air kg kg-1 MMLWGDA
115 Mass Density of Liquid Water Coating on Snow Expressed as Mass of Liquid Water per Unit Volume of Air kg m-3 MDLWSVA
116 Specific Mass of Liquid Water Coating on Snow Expressed as Mass of Liquid Water per Unit Mass of Moist Air kg kg-1 SMLWSMA
117 Mass Mixing Ratio of Liquid Water Coating on Snow Expressed as Mass of Liquid Water per Unit Mass of Dry Air kg kg-1 MMLWSDA
118 Unbalanced Component of Specific Humidity kg kg-1 UNCSH
119 Unbalanced Component of Specific Cloud Liquid Water content kg kg-1 UCSCLW
120 Unbalanced Component of Specific Cloud Ice Water content kg kg-1 UCSCIW
121 Fraction of Snow Cover Proportion FSNOWC
122 Precipitation intensity index See Table 4.247 PIIDX
123 Dominant precipitation type See Table 4.201 DPTYPE
124 Presence of showers See Table 4.222 PSHOW
125 Presence of blowing snow See Table 4.222 PBSNOW
126 Presence of blizzard See Table 4.222 PBLIZZ
127 Ice pellets (non-water equivalent) precipitation rate m s-1 ICEP
128 Total solid precipitation rate kg m-2 s-1 TSPRATE
129 Effective radius of cloud water m ERADCW
130 Effective radius of rain m ERADRAIN
131 Effective radius of cloud ice m ERADCICE
132 Effective radius of snow m ERADSNOW
133 Effective radius of graupel m ERADGRL
134 Effective radius of hail m ERADHAIL
135 Effective radius of subgrid liquid clouds m ERADSLC
136 Effective radius of subgrid ice clouds m ERADSIC
137 Effective aspect ratio of rain ERATIOR
138 Effective aspect ratio of cloud ice ERATIOCI
139 Effective aspect ratio of snow ERATIOS
140 Effective aspect ratio of graupel ERATIOG
141 Effective aspect ratio of hail ERATIOH
142 Effective ratio of subgrid ice clouds ERATOSIC
143 Potential evaporation rate kg m-2 s-1 PERATE
144 Specific rain water content (convective) kg kg-1 SRWATERC
145 Specific snow water content (convective) kg kg-1 SSNOWWC
146 Cloud ice precipitation rate kg m-2 s-1 CICEPR
147 Character of precipitation See Table 4.249 PERATE
148 Snow evaporation rate (see Note 9) kg m-2 s-1 SNOWERAT
149 Cloud water mixing ratio kg kg-1 CWATERMR
150-128 Reserved

129 Effective Radius of Cloud Water m EFRCWAT
130 Effective Radius of Rain m EFRRAIN
131 Effective Radius of Cloud Ice m EFRCICE
132 Effective Radius of Snow m EFRSNOW
133 Effective Radius of Graupel m EFRGRL
134 Effective Radius of Hail m EFRHAIL
135 Effective Radius of Subgrid Liquid Clouds m EFRSLC
136 Effective Radius of Subgrid Ice Clouds m EFRSICEC
137 Effective Aspect Ratio of Rain EFARRAIN
138 Effective Aspect Ratio of Cloud Ice EFARCICE
139 Effective Aspect Ratio of Snow EFARSNOW
140 Effective Aspect Ratio of Graupel EFARGRL
141 Effective Aspect Ratio of Hail EFARHAIL
142 Effective Aspect Ratio of Subgrid Ice Clouds EFARSIC
143-191 Reserved

192-254
Reserved for Local Use


192
Categorical Rain Code table 4.222 CRAIN
193
Categorical Freezing Rain Code table 4.222 CFRZR
194
Categorical Ice Pellets Code table 4.222 CICEP
195
Categorical Snow Code table 4.222 CSNOW
196
Convective Precipitation Rate kg m-2 s-1 CPRAT
197
Horizontal Moisture Divergence kg kg-1 s-1 MDIV
198
Minimum Relative Humidity % MINRH
199
Potential Evaporation kg m-2 PEVAP
200
Potential Evaporation Rate W m-2 PEVPR
201
Snow Cover %
SNOWC
202
Rain Fraction of Total Liquid Water
non-dim FRAIN
203
Rime Factor non-dim RIME
204
Total Column Integrated Rain kg m-2 TCOLR
205
Total Column Integrated Snow kg m-2 TCOLS
206
Total Icing Potential Diagnostic non-dim TIPD
207
Number concentration for ice particles non-dim NCIP
208
Snow temperature K
SNOT
209
Total column-integrated supercooled liquid water kg m-2 TCLSW
210
Total column-integrated melting ice kg m-2 TCOLM
211
Evaporation - Precipitation cm/day EMNP
212
Sublimation (evaporation from snow) W m-2 SBSNO
213
Deep Convective Moistening Rate kg kg-1 s-1 CNVMR
214
Shallow Convective Moistening Rate kg kg-1 s-1 SHAMR
215
Vertical Diffusion Moistening Rate kg kg-1 s-1 VDFMR
216
Condensation Pressure of Parcali
Lifted From Indicate Surface
Pa CONDP
217 Large scale moistening rate kg kg-1 s-1 LRGMR
218 Specific humidity at top of viscous sublayer kg kg-1 QZ0
219 Maximum specific humidity at 2m kg kg-1 QMAX
220 Minimum specific humidity at 2m kg kg-1 QMIN
221 Liquid precipitation (Rainfall) kg m-2 ARAIN
222 Snow temperature, depth-avg K SNOWT
223 Total precipitation (nearest grid point) kg m-2 APCPN
224 Convective precipitation (nearest grid point) kg m-2 ACPCPN
225 Freezing Rain kg m-2 FRZR
226 Pblackominant Weather (see Note 1) Numeric PWTHER
227 Frozen Rain kg m-2 FROZR
228 Flat Ice Accumulation (FRAM) kg m-2 FICEAC
229 Line Ice Accumulation (FRAM) kg m-2 LICEAC
230 Sleet Accumulation kg m-2 SLACC
231 Precipitation Potential Index % PPINDX
232 Probability Cloud Ice Present % PROBCIP
233 Snow Liquid ratio kg kg-1 SNOWLR
234 Precipitation Duration hour PCPDUR
235
Cloud Liquid Mixing Ratio
kg kg-1 CLLMR
236-240 Reserved

241 Total Snow kg m-2 TSNOW
242
Relative Humidity with Respect to Precipitable Water
%
RHPW
245
Hourly Maximum of Column Vertical Integrated Graupel on Entire Atmosphere kg m-2 MAXVIG
255
Missing




Notes:

* Parameter deprecated - See Regulation 92.6.2 and use another parameter instead.
** Total precipitation/snowfall rate stands for the sum of convective and large-scale precipitation/snowfall rate.
*** Statistical process 1 (Accumulation) does not change units. It is recommended to use another parameter with "rate" in its name and accumulation in PDT.

(1) The numeric value is a reference to a weather string and key table stored in the Local Use Section (Section 2) of the same GRIB2 message. See MDL Template 2.1 page and this page for more details.



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