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A November Arctic Blast

An early blast of cold arctic air will consume much of the eastern two-thirds of the U.S. over the next few days, making it feel like the middle of winter. Numerous record lows and record low maximum temperatures are expected through Wednesday, as temperatures average 20 to 30 degrees below normal. Read More >

Overview

During the afternoon of June 12th, 2001 a series of supercell thunderstorms produced eight reported tornadoes across northeastern Wyoming and southwestern South Dakota. Fortunately, only isolated areas of damage were reported from these storms.

The map at right shows the preliminary tornado reports (red "Ts"), which eventually were reduced to eight confirmed tornadoes because the same tornado was reported multiple times on several occasions. The green swaths represent the supercell thunderstorm tracks.

Preliminary location map
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