b	blue sky
c	cloudy
bc	partly cloud sky
o	overcast sky
r	rain
R	heavy rain
s	snow
r/s	rain followed by snow
rs	sleet
m	mist
f	fog
F	heavy fog
m/f	mist followed by fog
d	drizzle
tlr	thunderstorm
h	hail
g	gale
G	heavy gale
q	squalls
Q	heavy squals
z	dust haze
var.	winds variable
CALM	wind force zero