Image: Raleigh supercell 2

Description: A supercell thunderstorm as it is about to pass through Raleigh, North Carolina during the Mid-April 2011 tornado outbreak. HooK echoe visible at the suouthwest end, as well as a Tornado Vortex Signature (TVS) symbol (upside down triangle)
Title: Raleigh supercell 2
Credit: Gibson Ridge radar/National Weather Service
Author: Gibson Ridge radar/National Weather Service
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