The biggest dust storm in living memory rolls into Phoenix on July 5, 2011, reducing visibility to zero. Desert thunderstorms kicked up the mile-high wall of dust and sand.
Multiple lightning bolts strike in a summer monsoon thunderstorm southwest of Tucson, Arizona.
Ice blown off Lake Geneva, Switzerland, covers trees, cars and a promenade during a severe cold spell in February 2012. A cold front hit Europe with temperatures plummeting far below zero, killing several hundred people.