
A nor'easter will continue to bring significant coastal impacts to the Mid-Atlantic and New England into Monday. Moderate to major coastal flooding, heavy rain, strong winds, and high surf are expected. Hurricane Nolo will remain south of the Big Island of Hawaii with gusty winds and heavy rainfall that may bring significant, life-threatening flooding and mudslides through the weekend. 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
NWS Telecommunications Gateway
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