I’ve been reading about clouds for while now in the excellent The Cloudspotter’s Guide, am a follower of the The Cloud Appreciation Society and have been studying the surface charts for ages, to get an idea of what the weather will do, ahead of trips into the mountains and as I was working from home the other day I managed to nip out now and then to follow the progression of a warm front preceding a depression moving in from the west. I was expecting the classic sequence for a rise in air temperature:
Cirrus -> Cirrostratus -> Altostratus -> Nimbostratus -> Stratus -> Stratocumulus -> Cumulus
where the signs of approaching bad weather are heralded by Cirrus, which eventually joins up, spreads, lowers, thickens, rains, eases, rises, breaks up and disperses. The surface chart showed a depression coming in from the Atlantic so I settled down to some heavy duty Java programming but kept an eye on the weather:
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