A couple of frontal boundaries will move east and south from the Plains to the Gulf and Atlantic coastlines. These boundaries will focus showers and thunderstorms through the weekend, with scattered severe thunderstorms from the Southern Plains and across the Gulf Coast states. Locally heavy rainfall may also occur, which may be welcome news across drought areas. Meanwhile, heat spreads westward. Read More >
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) | 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 |
