GRIBv2 - Table 4.2-0-1 Meteorological

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 05/13/2025
Red text depicts changes made since 05/13/2025

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 (see Note 1)	kg m^-2 s^-1	PRATE
8	Total Precipitation (see Note 3)	kg m^-2	APCP
9	Large-Scale Precipitation (non-convective) (see Note 3)	kg m^-2	NCPCP
10	Convective Precipitation (see Note 3)	kg m^-2	ACPCP
11	Snow Depth	m	SNOD
12	Snowfall Rate Water Equivalent (see Note 1)	kg m^-2 s^-1	SRWEQ
13	Water Equivalent of Accumulated Snow Depth (see Note 3)	kg m^-2	WEASD
14	Convective Snow (see Note 3)	kg m^-2	SNOC
15	Large-Scale Snow (see Note 3)	kg m^-2	SNOL
16	Snow Melt (see Note 7)	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 (see Note 1)	%	MAXRH
28	Maximum Absolute Humidity (see Note 1)	kg m^-3	MAXAH
29	Total Snowfall (see Note 3)	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 (see Note 4)	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) (see Note 3)	kg m^-2	LSWP
48	Convective Water Precipitation (see Note 3)	kg m^-2	CWP
49	Total Water Precipitation (see Note 3)	kg m^-2	TWATP
50	Total Snow Precipitation (see Note 3)	kg m^-2	TSNOWP
51	Total Column Water (Vertically integrated total water (vapour+cloud water/ice)	kg m^-2	TCWAT
52	Total Precipitation Rate (see Note 2)	kg m^-2 s^-1	TPRATE
53	Total Snowfall Rate Water Equivalent (see Note 2)	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 (see Note 8)	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 (see Note 5)	kg m^-2 s^-1	TSPRATE
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	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 (see Note 6)	kg m^-2 s^-1	CICEPR
147	Character of precipitation	See Table 4.249	CHPRECIP
148	Snow evaporation rate (see Note 9)	kg m^-2 s^-1	SNOWERAT
149	Cloud water mixing ratio	kg kg^-1	CWATERMR
150	Column integrated eastward water vapour mass flux	kg m^-1s^-1	CEWVMF
151	Column integrated northward water vapour mass flux	kg m^-1s^-1	CNWVMF
152	Column integrated eastward cloud liquid water mass flux	kg m^-1s^-1	CECLWMF
153	Column integrated northward cloud liquid water mass flux	kg m^-1s^-1	CNCLWMF
154	Column integrated eastward cloud ice mass flux	kg m^-1s^-1	CECIMF
155	Column integrated northward cloud ice mass flux	kg m^-1s^-1	CNCIMF
156	Column integrated eastward rain mass flux	kg m^-1s^-1	CERMF
157	Column integrated northward rain mass flux	kg m^-1s^-1	CNRMF
158	Column integrated eastward snow mass flux	kg m^-1s^-1	CEFMF
159	Column integrated northward snow mass flux	kg m^-1s^-1	CNSMF
160	Column integrated divergence of water vapour mass flux	kg m^-1s^-1	CDWFMF
161	Column integrated divergence of cloud liquid water mass flux	kg m^-1s^-1	CDCLWMF
162	Column integrated divergence of cloud ice mass flux	kg m^-1s^-1	CDCIMF
163	Column integrated divergence of rain mass flux	kg m^-1s^-1	CDRMF
164	Column integrated divergence of snow mass flux	kg m^-1s^-1	CDSMF
165	Column integrated divergence of total water mass flux	kg m^-1s^-1	CDTWMF
166	Column integrated water vapour flux	kg m^-1s^-1	CWVF
167	Total column supercooled liquid water	kg m^-2	TCSLW
168	Saturation specific humidity with respect to water	kg m^-3	SSPFHW
169	Total column integrated saturation specific humidity with respect to water	kg m^-2	TCISSPFHW
170-191	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 Local Use Note A)	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	Hail Accumulation	m	HAILAC
237-240	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:
(1) Parameter deprecated - See Regulation 92.6.2 and use another parameter instead.

(2) Total precipitation/snowfall rate stands for the sum of convective and large-scale precipitation/snowfall rate.

(3) Statistical process 1 (Accumulation) does not change units. It is recommended to use another parameter with "rate" in its name and accumulation in PDT.

(4) The listed units for this parameter appear to be inappropriate for the potential evaporation rate. Instead, it is recommended to use parameter 143.

(5) Total solid precipitation includes the sum of all types of solid water, e.g. graupel, snow and hail.

(6) Assuming a cloud containing a bi-modal ice particle distribution, "cloud ice" refers to the small particle mode, whereas the large mode is usually called "snow". ("Ice pellets", in contrast, may refer to the precipitation of sleet, formed from freezing raindrops or refreezing (partially) melted snowflakes, or the precipitation of small hail.)

(7) It is recommended to use Snow melt rate instead (discipline 2, category 0, number 41).

(8) It is recommended to use parameter 148.

(9) Snow evaporation is the accumulated amount of water that has evaporated from snow from within the snow covered area of a grid-box.

Local Use Notes:
(A) 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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GRIB2 - TABLE 4.2-0-1

PARAMETERS FOR DISCIPLINE 0CATEGORY 1

(Meteorological products, Moisture category)

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

PARAMETERS FOR DISCIPLINE 0
CATEGORY 1

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