Dangerous Thunderstorms Over the Northern Plains

By , Expert Senior Meteorologist
Jul 13, 2010; 2:30 PM ET
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Play video Here is the latest on the severe weather threats for Tuesday evening in this video.

Thunderstorms firing over the northern Plains of the U.S. and into the Canadian Prairies are capable of producing a few tornadoes. Meanwhile, thunderstorms over the southern part of the Atlantic Seaboard can trigger flash flooding and gusty winds.

As a storm system spins over central Canada, a front spiraling outward and extending to the south will be the focusing point for locally damaging thunderstorms Tuesday night over the Dakotas, western Minnesota and as far south as northeastern Nebraska.

Some locations will be hit with straight-line wind gusts, large hail and flash flooding. A handful of the strongest thunderstorms can spin off a tornado. Seek shelter as these storms approach tonight, as they will also generate a great deal of cloud to ground lightning strikes.

The front will push eastward into eastern Minnesota, northwestern Wisconsin and northern Iowa on Wednesday with the same threats.

Meanwhile, a slow moving and much weaker frontal system will trigger drenching thunderstorms from New York state and southern New England to portions of Georgia Tuesday night into Wednesday.

The greatest risk from these storms is flash flooding. However, some of the stronger storms can bring damaging wind gusts and hail.

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