۱۳۹۰ دی ۱۷, شنبه

گرد با د – دیو باد - Tornadoes



Photograph by Carsten Peter, National Geographic
Tornadoes can be devastating, potent reminders of the awesome power of nature.
In this photo, a rare "mother ship" cloud formation is seen over Childress,Texas. This is a sign of a supercell thunderstorm, a type of storm that often kicks off tornadoes with winds exceeding 200 miles an hour (322 kilometers an hour).
Tornadoes can form over wide swaths of land and sea.

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