
Elevated to locally critical conditions will persist across the High Plains. Showers and scattered thunderstorms are expected over parts of the Southeast and Florida Peninsula. Clipper system will bring modest snowfall and strong winds from the Northern High Plains into the Upper Midwest this weekend. Record warmth will persist across the Southwest into the southern Plains. 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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