Days of persistent heavy rain puts millions in flash flood threat throughout the Midwest

An early-week tempest menace is expected to impact millions of Americans crossed the Midwest, arsenic forecasters show a increasing flash flood threat.

Starting connected Monday and lasting done the week, above-average vigor and humidity are fueling a flash flood threat.

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This is partially due to the fact that the Upper Midwest has already experienced truthful overmuch rainfall that saturated ungraded tin nary longer grip the buildup of water.

The FOX Forecast Center is monitoring a slow-moving tempest strategy that volition walk done the Upper Midwest opening Monday afternoon.

The beforehand traveling with this tempest volition bring precocious levels of combined moisture, allowing days of persistent thunderstorms passim the region.

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These storms volition make a "train" effect, with each strategy pursuing the next.

"Much similar boxcars connected a bid track, idiosyncratic thunderstorm cells volition walk implicit the nonstop aforesaid portion of land, 1 aft the other," the FOX Forecast Center said.

This persistent circular of storms volition statesman astir the North Dakota-Minnesota borderline precocious Monday evening, past determination into Northern Wisconsin and Michigan by Thursday.

As a effect of this impending tempest setup, a Level 2 retired of 4 flash flood menace is progressive starting Tuesday done Wednesday for large cities specified arsenic Minneapolis, Duluth and Green Bay, Wisconsin. 

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These locations could spot mean to dense rainfall done the week, with immoderate areas seeing up to 3 inches.

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As the week progresses, flood alerts volition stay successful spot arsenic localized rainfall totals statesman to adhd up, raising interest arsenic the bedewed upwind shows nary signs of slowing.

Stay with FOX Weather for the latest.