Saturday, August 08, 2015

Thunderhead overhead

These thunderheads with thunder and lightning are becoming a daily occurrence this time of year but they are usually over the mountains miles to the Northeast. This one rolled in yesterday directly overhead with lots of noise but no fireworks. This morning the Northeast was totally clear with a noisy thunderhead over the ocean. Strange weather ..... but no tropical storms in sight.

Cumulonimbus, from the Latin cumulus ("heap") and nimbus ("rainstorm", "storm cloud"), is a dense towering vertical cloud associated with thunderstorms and atmospheric instability, forming from water vapor carried by powerful upward air currents. Cumulonimbus can form alone, in clusters, or along cold front squall lines. These clouds are capable of producing lightning and other dangerous severe weather, such as tornadoes. 


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