The National Weather Service extended severe thunderstorm warnings for parts of Milwaukee and Waukesha counties until 6:30 p.m. Wind gusts could reach 60 mph, and penny-sized hail is possible. Expect damage to roofs, siding and trees.

Severe thunderstorms have triggered flash flooding across portions of southeastern Wisconsin, prompting the National Weather Service to issue a flash flood warning. The alert, issued at 8:55 a.m. Sunday,

The National Weather Service has issued a flash flood warning for parts of Milwaukee, Ozaukee, Washington, and Waukesha counties. Up to 8 inches of rain has already fallen since last night, with more on the way.