Table B6
| Explanation of Data Designators T1T2A1A2ii CCCC |
| TABLE B6 Data type designator T2 (when T1 = P, Q) |
| Instructions for the proper application of the level designators |
| (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. |
| T1 | T2 | T2 - Data Type |
| P, Q | A | Radar data |
| P, Q | B | Cloud |
| P, Q | C | Clear air turbulence |
| P, Q | D | Thickness (relative topography) |
| P, Q | E | Precipitation |
| P, Q | F | Aerological diagrams (Ash Cloud) |
| P, Q | G | Significant weather |
| P, Q | H | Height |
| P, Q | I | Ice flow |
| P, Q | J | Wave height + combinations |
| P, Q | K | Swell height + combinations |
| P, Q | L | Plain language |
| P, Q | M | For national use |
| P, Q | N | Radiation |
| P, Q | O | Vertical velocity |
| P, Q | P | Pressure |
| P, Q | Q | Wet bulb potential temperature |
| P, Q | R | Relative humidity |
| P, Q | S | Snow cover |
| P, Q | T | Temperature |
| P, Q | U | Eastward wind component |
| P, Q | V | Northward wind component |
| P, Q | W | Wind |
| P, Q | X | Lifted index |
| P, Q | Y | Observational plotted chart |
| P, Q | Z | Not assigned |