By rogier64

Changing clouds

Great sky tonight with clouds changing rapidly from form and type!

The dark grey clouds are Cumulus congestus developing into Cumulonimbus calvus. That happens very fast, impressive to watch.

Cumulus clouds are often the sign of good weather and settled conditions. However if they develop into Cumulonimbus clouds, you can expect conditions to change for the worse.

The whit/orange clouds are clouds higher in the atmosphere and are called Cirrus radiatus. Cirrus clouds also often appear before major atmospheric disturbances.

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