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Heavy Rainfall and Flash Flooding Over the Southeast; Lingering Fire Weather Concerns in the West

Heavy rainfall, flooding, gusty winds, and the risk of a few tornadoes will continue over portions of the Southeast U.S. as Sally gradually weakens. Elsewhere, critical fire weather conditions linger over parts of Oregon, northern California, and the Great Basin, along with poor air quality for much of the West. Cool weather prevails from the Upper Midwest into New England. Read More >

Overview

During the evening of June 15, 2019, a brief tornado occurred 5.5 miles to the northeast of Estelline, SD.  The tornado lasted less than a minute (at around 6:05 PM CDT) and knocked down 7 trees at a farmstead.  The tornado was moving in an easterly direction and the tornado tossed tree branches to the south and west from the group of trees that were knocked down.  One of the trees hit the corner of a shed and bent part of the metal overhang on the shed. 

Based off radar data, damage report, and a Facebook video, the tornado that occurred northeast of Estelline appears to be a very rare "anticyclonic" tornado, which means that it was rotating in a clockwise direction. In the Northern Hemisphere, nearly all of the tornadoes that occur rotate in a counter-clockwise ("cyclonic") direction and estimates indicate that maybe only 1% of tornadoes are anticyclonic like the one that occurred on June 15th.

This storm split off from the parent thunderstorm and moved easterly, while the parent storm continued to the southeast. Meteorologists define these types of storms as "left moving" since they move to the left of the storm that they split from.  

Screenshot from Facebook video by Sean and Kathy Lesnar
Screenshot from Facebook video by Sean and Kathy Lesnar
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