Severe weather and flooding threats will continue for portions of the central U.S. over the next couple of days, with multiple rounds of thunderstorms expected. Dangerous heat will persist across the southern and western U.S. through mid-week. Hot and dry conditions will fuel fire weather concerns for the Intermountain West, where dry thunderstorms may spark additional wildfires. 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 |
