A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >
Instructions for the proper application of the data type designator
1. The designator specified in this table should be used to the greatest extent possible to indicate the type of data contained within the text of the bulletin.
2. Where more than one type is contained in the text, the designator for one of the data types should be used.
3. When the table does not contain a suitable designator for the data type, an alphabetic designator which is not assigned in the table should be introduced and the WMO secretariat notified.
| Designator | Data Type |
| A | Radar data |
| B | Cloud |
| C | Vorticity |
| D | Thickness (relative topography) |
| E | Precipitation |
| F | Unassigned |
| G | Divergence |
| H | Height |
| I | Unassigned |
| J | Wave height + combinations |
| K | Swell height + combinations |
| L | Unassigned |
| M | For national use |
| N | Radiation |
| O | Vertical velocity |
| P | Pressure |
| Q | Web bulb potential temperature |
| R | Relative humidity |
| S | Unassigned |
| T | Temperature |
| U | Eastward wind component |
| V | Northward wind component |
| W | Wind |
| X | Unassigned |
| Y | Unassigned |
| Z | Unassigned |
