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Project Vortex-99: Occluded mesocyclone tornado (NOAA/unidentified fotog)

Public Domain. Credit: OAR/ERL/National Severe Storms Laboratory (NSSL) via [pingnews].

 

Project Vortex-99. Occluded mesocyclone tornado. Occluded means old circulation on a storm; this tornado was forming while the new circulation was beginning to form the tornadoes which preceeded the F5 Oklahoma City tornado. Photo #3 of sequence.

 

Image ID: nssl0210, NOAA's National Severe Storms Laboratory (NSSL) Collection

Location: 7 miles south of Anadarko, Oklahoma

Photo Date: May 3, 1999

Credit: OAR/ERL/National Severe Storms Laboratory (NSSL)

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Taken on May 3, 1999