Table C5
| Explanation of Data Designators T1T2A1A2ii CCCC |
| TABLE C5 Reference time designator A2 (when T1 = Q or Y) |
| Instructions for the proper application of the level designators |
| T1 | A2 | A2 - Reference Time Designator |
| Q, X or Y | A | Analysis (00 hour) |
| Q, X or Y | B | 3 hours forecast |
| Q, X or Y | C | 6 hours forecast |
| Q, X or Y | D | 9 hours forecast |
| Q, X or Y | E | 12 hours forecast |
| Q, X or Y | F | 15 hours forecast |
| Q, X or Y | G | 18 hours forecast |
| Q, X or Y | H | 21 hours forecast |
| Q, X or Y | I | 24 hours forecast |
| Q, X or Y | J | 27 hours forecast |
| Q, X or Y | K | 30 hours forecast |
| Q, X or Y | L | 33 hours forecast |
| Q, X or Y | M | 36 hours forecast |
| Q, X or Y | N | 39 hours forecast |
| Q, X or Y | O | 42 hours forecast |
| Q, X or Y | P | 45 hours forecast |
| Q, X or Y | Q | 48 hours forecast |