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Cumulonimbus With Anvil- St. Mary's, OH		06/25/2009

Photographer's description not available

Photographer	Bob Warren - Auglaize County SKYWARN
Date taken	June 25, 2009
Location	St. Marys, OH (Auglaize County) map
Event	Cumulonimbus

Additional notes

Anvil clouds form when a rising updraft encounters warm air aloft and reaches a "lid". This causes the updraft to cease rising and the air fans out. Anvils are signs of a mature thunderstorm. In this photo, the anvil has rough, well-defined edges which implies the updraft is strong. An anvil with ragged edges suggests the updraft is weak.

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