Skip Navigation Linkwww.weather.gov 
NOAA logo - Select to go to the NOAA homepage National Weather Service Headquarters Office   NWS logo
NWS Office of the Chief Information Officer/Telecommunication Operations Center
 
    
Home Page > Organization > OCIO > TOC > The Gateway > The WMO > Codes & Headings > Heading Tables > Table C4

Table C4

Reference Time designator A2
(when T1   =   D,G,H,J, O, P, or T)

Instructions for the proper application of the reference time designator

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

2. When the table does not contain a suitable designator for the reference time, an alphabetic designator which is not assigned in the table should be introduced and the WMO secretariat notified.


Designator
Data Type
 Designator
Data Type
A Analysis (00 hour) L 84 hours forecast
B 6 hours forecast M 96 hours forecast
C 12 hours forecast N 108 hours forecast
D 18 hours forecasts O 120 hours forecast
E 24 hours forecast P 132 hours forecast
F 30 hours forecast Q 144 hours forecast
G 36 hours forecast R 156 hours forecast
H 42 hours forecast S 168 hours forecast
I 48 hours forecast T 10 days forecast
J 60 hours forecast U 15 days forecast
K 72 hours forecast V 30 days forecast
    W-Z Not assigned

US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Office of the Chief Information Officer (OCIO)
1325 East West Highway
Silver Spring, MD 20910
Page last modified: April 24, 2002
Page Author: Internet Services Group		 Disclaimer
Feedback 		Privacy Policy
Credits