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Heavy Snow and Strong Winds Across the North-Central U.S.; Heavy Rain and Flash Flooding in American Samoa and Puerto Rico

Areas of moderate to heavy snow and gusty to high winds are expected across the Northern Plains, Upper Midwest and Great Lakes into Friday. Several inches of snow accumulation is expected. Heavy rain will bring an isolated flash flood threat to Puerto Rico and flash flooding along with mudslides to American Samoa today. Read More >

Overview of September 20-21 Flooding

A large mid to upper level low pressure system moved across North Dakota on September 20th through September 21st, 2019. This low pressure system led to excessive rain across much of central North Dakota, as the atmosphere featured anomalously high moisture with a low level jet impinging on a stationary frontal boundary. These ingredients created a perfect scenario for thunderstorm training, which generally occurred in a line extending from Morton through Burleigh, Kidder, Stutsman, Sheridan, Wells, and Foster counties. The hardest hit areas were in portions of Sheridan and Wells counties, where some areas received over 7 inches of rain in less than 15 hours. This led to rather extensive rural flooding, which resulted in a road washout on Highway 200 in Wells County.

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Radar Estimated Rainfall Amounts

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Road Washout on Highway 200 in Wells County

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MRMS CREST Soil Moisture

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Radar Loop

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MRMS CREST Max Unit Streamflow

   
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