Table AIV-4.—WMO CODE 0901
WMO CODE 0901
E - State of the mound without snow or measurable ice cover.
Code
STATE OF THE GROUND
0
Dry (without cracks, dust, or lose sand).
1
Moist.
2
Wet (standing puddles).
3
Flooded.
4
Frozen.
5
Glaze ice.
6
Patchy loose dust or sand.
7
Thin layer of loose dust or sand covers ground completely.
8
Moderate or thick layer of loose dust or sand covers ground
completely .
9
Extremely dry with cracks.
Table AIV-5.—WMO CODE 1600
WMO CODE 1600
h - Height above surface of the
base of the lowest clouds
seen.
* U.S. observers use the
modified scale in feet.
Code
0
1
2
3
4
5
6
7
8
9
Meters
*Feet
0 to
49
0 to
99
50 to
99
100 to 299
100 to
199
300 to 699
200 to 299
700 to 999
300 to 599
1000 to 1999
600 to 999
2000 to 3299
1000 to 1499
3300 to 4899
1500 to 1999
4900 to 6499
2000 to 2499
6500 to 7999
No clouds or
No clouds or
2500m
8000ft
/
Unknown
Unknown
AIV-12
