|Double rainbow, clearing rain shower, Canyoneers river rafting office, Flagstaff, Arizona|
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Besides being the primary source of the Southwest's summertime precipitation, it's also a gorgeous time for photographers and nature lovers. Arizona blue sky, dramatic cumulus and thunderhead clouds, rain curtains, and sunshine can sometimes be seen all at once. Grass and other ground plants sprout, greening the forests and rangeland.
And the rain showers usually are brief, though sometimes intense. They are what flash floods can be borne of.