0 0 CLEAR AND DRY
1 1 DAMP
2 2 WET WITH WATER PATCHES
3 3 RIME AND FROST COVERED (DEPTH NORMALLY LESS THAN 1 MM)
4 4 DRY SNOW
5 5 WET SNOW
6 6 SLUSH
7 7 ICE
8 8 COMPACTED OR ROLLED SNOW
9 9 FROZEN RUTS OR RIDGES
15 15 MISSING OR NOT REPORTED (E.G. DUE TO RUNWAY CLEARANCE IN PROGRESS)
