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Dangerous Heat Expands; Heavy Rainfall Threats; Fire Weather Concerns for the West

The heat will increase and expand across the Central Plains, Mississippi Valley, Southeast and into the Eastern U.S. through the week as high pressure builds across the eastern two-thirds of the country. On the northern periphery of this heat, the threat for severe thunderstorms and heavy rainfall across the northern Plains and upper Midwest through Tuesday. Critical Fire Weather for the west. Read More >

Overview

An area of low pressure and cold front moved through the Northern Plains during the afternoon and evening hours of August 11, 2019. This storm system, combined with above average water in the atmosphere, created numerous thunderstorms across most of western South Dakota. Runoff from the heavy rain caused flash flooding and flooding across portions of Oglala Lakota County. Three to five inches of rain was reported between Porcupine, Sharps Corner, and Kyle. A large amount of the precipitation fell over Iron Cloud Canyon, causing flash flooding of BIA 27 between Evergreen and Gooseneck Road. Several feet of fast moving water inundated BIA 27 and caused significant flooding of Porcupine Creek. As the flood waters continued along Porcupine Creek, BIA 2 just east of Sharps Corner was inundated by the morning of August 12th. Additional flooding along Porcupine Creek continued downstream to the White River.

 

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