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Dangerous Wind Chills in the Northeast; High Winds in the High Plains; Heavy Snow Coming to the Sierras

Dangerously cold wind chill temperatures will continue to impact the Northeast U.S. through Saturday evening along with blizzard conditions in northern Maine. High winds may bring power outages, tree and property damage, and difficult travel over the northern Rocky Mountain Front and adjacent High Plains through Saturday afternoon. Heavy snow will move into the Sierras of California Saturday. Read More >

Overview

On Wednesday, June 19, 2019 a thunderstorm began to develop on the border of Park and Big Horn counties around 5 PM. As this storm moved east it strengthened and reached its peak intensity in extreme southeastern Big Horn County. The storm crossed into Johnson County and produced a tornado on Powder River Pass in the Bighorn Mountains just before 7 PM. Considerable tree damage occurred along and near US Highway 16 as the tornado moved east along its 3.7 mile path. Hundreds of conifer trees were uprooted or snapped at their trunks. Additionally, several large wooden snow fences were torn apart, with fencing debris thrown in all directions. This tornado was unusual in that it occurred at a high elevation of just under 10,000 ft along its western path. 

The damage produced by this storm was consistent with an EF-1 tornado, with estimated peak winds of 110 mph. The time of the tornado was estimated by comparing the location of the damage with radar imagery.  
 

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A destroyed snow fence on the north side of US Highway 16
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