Stormy weather

"OH MY GOD" photograph copyright 2010 Carole Brown

This photo was taken on Monday 18 Jan, 2010 in the Californian central valley between Stockton and Discovery Bay, as we traveled west on the way back to Moraga from Arnold. It was a forewarning of the mad winds and torrential rain that was to come the next few days!

See for more information on this cloud type, called Mammatus, rarely seen in western USA.