Gulf moisture will combine with a cold front and will bring heavy rain and scattered flash flooding over parts of the Mid-South into the Ohio Valley through the morning and the Ohio Valley and Central Appalachians on Tuesday. Showers and thunderstorms, some severe, are expected over the Southern Rockies/Southern High Plains on Tuesday. 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 |
