1
Q
Ci
A
Nil
2
Q
Cs
A
Too high
3
Q
Cc
A
Too high
4
Q
Thin As
A
Some Risk - Light Rime
5
Q
Thick As
A
Definite risk - Moderate Rime
Clear possible in lower levels
6
Q
Ac
A
May be light rime
7
Q
Ns
A
Definitely risk - moderate rime
Clear ice probable
8
Q
Cu fine weather
A
Little risk
9
Q
Large Cu
A
Definite risk - clear ice just ABV FZ LVL
10
Q
Cb
A
Definite risk - clear ice probable
11
Q
Sc
A
Occasional rime if fz LOL low enough
12
Q
St
A
Nil
IREX
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