| Altitude of the base of the lowest layer of clouds covering more than half of the sky below 20000 ft. |
| Height of the base of the lowest layer of clouds covering more than half of the sky below 10000 ft. |
| Height of the base of the highest layer of clouds covering more than half of the sky below 20000 ft. |
| Height of the base of the lowest layer of clouds covering more than half of the sky below 20000 ft. |
EN 