Section 4 - Code Table 203 : Cloud type

Code Tables for Section 4

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Code Meaning
0 Clear
1 Cumulonimbus
2 Stratus
3 Stratocumulus
4 Cumulus
5 Altostratus
6 Nimbostratus
7 Altocumulus
8 Cirrostratus
9 Cirrocumulus
10 Cirrus
11 Cumulonimbus - ground-based fog beneath the lowest layer
12 Stratus - ground-based fog beneath the lowest layer
13 Stratocumulus - ground-based fog beneath the lowest layer
14 Cumulus - ground-based fog beneath the lowest layer
15 Altostratus - ground-based fog beneath the lowest layer
16 Nimbostratus - ground-based fog beneath the lowest layer
17 Altocumulus - ground-based fog beneath the lowest layer
18 Cirrostratus - ground-based fog beneath the lowest layer
19 Cirrocumulus - ground-based fog beneath the lowest layer
20 Cirrus - ground-based fog beneath the lowest layer
191 Unknown
255 Missing

( 1) Code figures 11-20 indicate all four layers were used and a ground-based fog is beneath the lowest layer.