National Weather Service United States Department of Commerce

Areas of Severe Thunderstorms and Excessive Rainfall through This Weekend

A multi-day thunderstorm and heavy rain event will impact the south-central U.S. this Memorial Day weekend. Severe thunderstorms may produce large hail, severe gusts, and a possible tornado or two across portions of the central and southern Plains through Monday. The threat for heavy to excessive rainfall and possible flash flooding will return to the south-central U.S., especially in the Ozarks. Read More >

Overview

An active pattern set up across South Dakota from August 9th-11th, in which round after round of severe storms and heavy rain developed and moved east. The last round in this series developed in a very moisture-laden environment across eastern South Dakota on Thursday evening, August 11th, and produced very heavy rainfall primarily across Clark, Codington, Hamlin, and Deuel counties. Flooding resulted, with Watertown, SD being among the hardest hit.

 

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