HBLCS - Height above surface of the base of the lowest cloud seen
| Code Figure | Description |
|---|---|
| 0 | 0 to 50 meters |
| 1 | 50 to 100 meters |
| 2 | 100 to 200 meters |
| 3 | 200 to 300 meters |
| 4 | 300 to 600 meters |
| 5 | 600 to 1000 meters |
| 6 | 1000 to 1500 meters |
| 7 | 1500 to 2000 meters |
| 8 | 2000 to 2500 meters |
| 9 | 2500 meters or more, no clouds |
| 10-13 | Reserved |
| 14 | Height of base of cloud not known or base of clouds at a level lower and tops at a level higher than that of the station |
| 15 | Missing value |
