Wow! These things will “explode” from nothing to mammoth mushroom clouds in nothing flat.
They sure do...impressive! The storm moving from Washita into Custer County will be the one to watch in the near term..and if it can become rooted in the boundary layer.
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http://www.americanwx.com/bb/index.php/forum/14-centralwestern-states/
Storm in Custer Co already is severe and has indications of hail up to 1.75 inches and some rotation.