After multiple rounds of storms in recent days , severe weather is expected to return to the Northern Plains and upper Midwest on Friday, Aug. 8.

Roughly 5.5 million people are in the area most at ris k for strong to severe thunderstorms, according to the Storm Prediction Center. The threat zone includes parts of the Dakotas, most of Minnesota and a portion of Wisconsin.

Major cities at risk include Minneapolis, St. Paul and Duluth in Minnesota; Sioux Falls, South Dakota; and Fargo, North Dakota.

Here's what to expect.

Severe weather expected in South Dakota

While forecasters warn that "very large hail" and "a few tornadoes" are likely in the heightened risk area centered on North Dakota, isolated storms with the potential for significant threats are also possible across South Dak

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