Winter 1947:Key to weather symbols used on the London Reports
       
b
 blue sky:fine weather
l
 lightning
bc
 blue sky with clouds:fair weather
m
 mist
c
 cloudy
o
 overcast
d
 drizzle (moderate or unspecified)
p
 passing showers
dd
 drizzle (moderate), continuous
q
 squalls
d0
 drizzle (slight)
r
 rain
d0d0
 drizzle (slight), continuous
rr
 continuous moderate rain, and so on as for drizzle
D
 drizzle (heavy)
s
 snow
DD
 drizzle (heavy), continuous
ss
 continuous moderate snow, and so on
e
 wet air, wet fog
t
 thunder
f
 fog
u
 ugly, threatening sky
F
 Dense fog
v
 unusual visibility
g
 gale
w
 dew
h
 hail
x
 frost
i
 intermittent
y
 very dry air
j
 ..in sight
z
 haze
ks
 Drifting snow Solar halo
   
Lunar halo