Boston under flash flood warning
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The storm traveling east has already resulted in an evacuation order from the Harley-Davidson festival on Milwaukee's lakefront.
A severe thunderstorm warning was released by the National Weather Service on Friday at 4:28 p.m. EDT in effect until 5:15 p.m. EDT for Gratiot County.
Damaging winds and hail so large it could cause injury to people and animals and damage buildings was expected with the storms.
15hon MSN
Rainfall amounts of 2 to 3 inches are possible overnight for much of Iowa, with locally higher amounts. Dozens of counties are under a flood watch.
A tornado warning is in effect until 9:15 p.m. in New Castle County, Delaware.
Intense warnings issued in D.C. and surrounding counties threaten power and safety. Stay informed with the latest updates.