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WMO Header Descriptions for Gridpoint Data

WMO Header information

Syntax:

TVGFLL SSSS

Where:

T - Report type
V - Variable
G - Grid type
F - Forecast time
LL - Vertical level
SSSS - Report dissimination location

Report Type (T)

T Description
H NMC GRIB Products (AVN, STT, ECMWF models)
Y,Z NGM AWIPS Products (ETA, NGM, AVN, MRF models)
G ECMWF GRID Products

Variable (V)

V Variable V Variable
A Extreme temperature, winds, clouds B Wind shear
C Absolute Vorticity D Prob of precipitation
E Precipitation F Precipitable water
G Convective precipitation H Geopotential height
I   J  
K Wave period L Wave direction
M   N  
O Vertical velocity P Pressure
Q 4 layer lifted index R Relative humidity
S Snow cover T Temperature
U U wind component V V wind component
W CAPE X Lifted index
Y Convective inhibition Z Helicity

Grid Type (G)

G Grid type G Grid type
A 21/201 B 22
C 23 D 24
E 25 F 26
G 50 H 213
I 37/202 J 38/203
K 39/204 L 40/205
M 41/206 N 42/207
O 43/208 P 44
Q 211 R 212
S 213 T 61/214
U 62/215 V 63
W 64 X  

Forecast Time (F)

6 hour designation (ETA, NGM, AVN, MRF)

F Forecast time F Forecast time
A 0 hour B 6 hour
C 12 hour D 18 hour
E 24 hour F 30 hour
G 36 hour H 42 hour
I 48 hour J 60 hour
K 72 hour-3 day L 84 hour
M 96 hour-4 day N 108 hour
O 120 hour-5 day P 132 hour
Q 144 hour-6 day R 156 hour
S 168 hour-7 day T 180 hour
U 192 hour-8 day V 204 hour
W 216 hour-9 day X 228 hour
Y 240 hour-10 day    

3 hour designation (mesoETA)

F Forecast time F Forecast time
A 0 hour B 3 hour
C 6 hour D 9 hour
E 12 hour F 15 hour
G 18 hour H 21 hour
I 24 hour J 27 hour
K 30 hour L 33 hour
M 36 hour N 39 hour
O 42 hour P 45 hour
Q 48 hour    

Level (LL)

LL Level LL Level
99 1000 mb 98 Surface
97 Tropopause 96 Max wind
95 950 mb 94 Freezing level
93   92 925 mb
91   90 900 mb
89 Surface 88 Ground
87   86 Boundary layer
85 850 mb 80 800 mb
75 750 mb 70 700 mb
65 650 mb 60 600 mb
55 550 mb 50 500 mb
45 450 mb 40 400 mb
35 350 mb 30 300 mb
25 250 mb 20 200 mb
15 150 mb 10 100 mb

For further information about WXP, email technical-support@weather.unisys.com
Last updated by Dan Vietor on August 11, 1998