An unusually strong late-season storm is threatening the Midwest from the central Plains to the Mississippi Valley over the next several days.
Showers and scattered thunderstorms tracked across southern Wisconsin Friday morning. Friday morning's round of storms resulted in scattered power outages.
Later Friday afternoon and Friday night, strong to severe thunderstorms will be possible in southern Wisconsin. It appears that the strongest of these storms will develop in Iowa and then track into Wisconsin. Large hail, damaging winds and tornadoes are possible with the strongest storms. Heavy rainfall is also possible.
The severe weather threat continues on Saturday as a cold front moves from west to east across Wisconsin. Showers and thunderstorms are expected, especially in the afternoon and the Storm Prediction Center has all of southern Wisconsin in a Slight Risk for severe weather. It will still be warm and muggy until that front moves through.
The severe weather threat will end with the passage of the cold front Saturday evening. Sunday will be much cooler with just a few lingering showers possible in the afternoon.
A foot of snow had fallen in the northern South Dakota's Black Hills early Friday. In South Dakota, as much as 30 inches of snow could fall in the Black Hills, with 12 inches on the plains.