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Home Page > Organization > OCIO > TOC > The Gateway > The WMO > Codes & Headings > Heading Tables > Table C8


Table C8
Geographical area designator A

Instructions for the proper application of the data type designator

1. The designator specified in this table should be used to the greatest extent possible to indicate the geographical area of the data contained within the text of the bulletin.

2. Where the geographical area of the data does not correspond exactly with the designator, the designator for the area most approximating that of the data may be used.

3. When the table does not contain a suitable designator for the geographical area, an alphabetic designator which is not assigned in the table will be introduced.



(when T1 = H)
U.S. National Table derived from WMO Table C3
Designator Geographical AreaNCEP Grid No.
A 0 - 180E northern hemisphere[21]
B180W - 0 northern hemisphere[22]
C 0 - 180E southern hemisphere[23]
D 180W - 0 southern hemisphere[24]
E 0 - 355E northern hemisphere[25]
F 0 - 355E southern hemisphere[26]
G Regional use 
H Not assigned 
I30W - 60E northern hemisphere [37]
J60W - 150E northerm hemisphere [38]
K150E - 120W northern hemisphere [39]
L120W - 30W northern hemisphere [40]
M30W - 60E southern hemisphere [41]
N60W - 150E southern hemisphere [42]
O150E - 120W southern hemisphere [43]
P120W - 30W southern hemisphere [44]
Q-SNot assigned  
T0 - 180E northern hemisphere [61]
U180W - 0 northern hemisphere [62]
V0 - 180E southern hemisphere [63]
W180W - 0 southern hemisphere [64]
XRegional use  
Y-ZNot assigned  





Geographical area designator A

(when T1 = Y or Z)
Designator Geographical AreaNCEP Grid No.
Anorthern hemisphere[201]
BNot assigned 
C Not assigned 
DNot assigned 
ENot assigned 
FAWIPS[215]
GHRAP (AWIPS) 
HNational CONUS w/Double Resolution[213]
INational CONUS [202]
JNational Alaska [203]
KNational Hawaii [204]
LNational Puerto Rico [205]
MRegional MARD [206]
NRegional Alaska [207]
ORegional Hawaii [208]
PRegional Puerto Rico [210]
QRegional CONUS [211]
RRegional CONUS w/Double Resolution [212]
SRegional MARD w/Double Resolution [209]
TRegional Alaska w/Double Resolution [214]
URegional CONUS [215]
VRegional Alaska [216]
WAWIPS [236]
XCurrent icing potential (CIP2) [255]
Y-ZNot assigned  
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