A low pressure zone hovering over southern Utah directed unstable air into northern Arizona from the west, opposite the usual monsoon flow. Cumulus clouds form over the San Francisco peaks, building to the stratosphere, becoming cumulonimbus clouds that drop heavy rain, and spout downbursts. as they drift across the landscape..The speed of the action in this video has been increased by a factor of 120.
It's good to know you were not in Reno.
2te2 5 months ago