Heavy rainfall and flooding concerns remain for today across Central Texas and the Hill Country, with scattered thunderstorms expected this afternoon and evening. Tropical Storm Chantal has formed and will bring heavy rainfall and flooding concerns to portions of the coastal Carolinas. Life-threatening surf and rip currents are expected from the Southeast to Mid-Atlantic. Read More >
NWS Telecommunications Gateway
National Program
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 |
|
Designator |
|
A | Analysis (00 hour) | N | 39 hours forecast |
B | 3 hours forecast | O | 42 hours forecast |
C | 6 hours forecast | P | 45 hours forecast |
D | 9 hours forecasts | Q | 48 hours forecast |
E | 12 hours forecast | R | 54 hours forecast [48+6] |
F | 15 hours forecast | S | 66 hours forecast [+12] |
G | 18 hours forecast | T | 78 hours forecast |
H | 21 hours forecast | U | 90 hours forecast |
I | 24 hours forecast | V | 102 days forecast |
J | 27 hours forecast | W | 114 days forecast |
K | 30 hours forecast | X | 126 days forecast |
L | 33 hours forecast | Y | 138 days forecast |
M | 36 hours forecast | Z | 150 days forecast |
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
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