May 23, 2011

Longest-lasting thunderstorms


Who

Supercell

Where

Not Applicable

When

2011

Details

Supercells are powerful thunderstorms which form around a mesocyclone, a deep, rotating updraft. At up to several kilometres across, they can last several hours, making them the longest-lasting and largest of all thunderstorms. They often occur on the Great Plains of the USA and can spawn tornadoes. 

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