
A cold front will linger over Florida through Tuesday, bringing widespread showers and thunderstorms, and potential flash flooding concerns. Showers and thunderstorms will be most widespread across eastern and central Florida. Gusty winds and dry conditions will promote elevated to critical fire weather conditions across the southern Plains and southern Rockies through Monday. 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, use "Z" and obtain the forecast hour from the GRIB Product Definition Section.
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| A | Analysis (00 hour) | N | 18 hours forecast |
| B | 1 hour forecast | O | 24 hours forecast |
| C | 2 hours forecast | P | 30 hours forecast |
| D | 3 hours forecasts | Q | 36 hours forecast |
| E | 4 hours forecast | R | 42 hours forecast |
| F | 5 hours forecast | S | 48 hours forecast (2 days) |
| G | 6 hours forecast | T | 60 hours forecast |
| H | 7 hours forecast | U | 72 hours forecast (3 days) |
| I | 8 hours forecast | V | 84 hours forecast |
| J | 9 hours forecast | W | 96 hours forecast (4 days) |
| K | 10 hours forecast | X | 108 days forecast |
| L | 11 hours forecast | Y | 120 hours forecast (5 days) |
| M | 12 hours forecast | Z | Time contained in PDS |
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
NWS Telecommunications Gateway
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(301)-683-1518
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