clouds

 Lenticular clouds

usually, when I think of Australia, I think of blue skies, like the one below in Tasmania, not the stormy sky of SA

some skies for Sunday Stamps

Sunday Stamps II - 69

Great Britain 2001, Weather
illustrator: Tony Meeuwissen

Issued in March of 2001, this stamp is one of four; the others showing rain, fair, and stormy which when shown together form a barometer. They were voted the most popular British stamps of that year.

for weather
and, of course, even a stamp showing mist, snow, clouds, or a bright blue sky could be weather related