December - snowflakes You are here: Home Photo gallery Clouds Severe weather Roll clouds


Storms are sometimes accompanied by arcus, a roll cloud. Cold air rushes out of a downdraft and lifts warmer air in front of the storm complex up to condensation level, making both a fascinating and menacing sight while it is approaching at high velocity.

4 photos in gallery
Click images for large photos




w-097-29

w-044-10

w-044-08

w-044-06