Northern Plains Tornadoes Included in Thursday Evening Severe Weather

By , Expert Senior Meteorologist
Jun 17, 2010; 2:36 PM ET
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Play video The latest on the severe weather in the Northern Plains.

The greatest risk to lives and property lies across the northern Plains and Upper Midwest tonight, where a tornado outbreak is unfolding for Thursday evening.

Tornadoes and hail were reported Thursday evening. Millerville, Minn. reported 4.25 inch hail, while a large tornado with debris was confirmed northwest of Grand Forks, N.D. Other damaging winds and tornadoes were also reported.

There are also other areas that can be hit by locally damaging thunderstorms in the Tennessee Valley and southern Plains Thursday night.

Situation Serious Over Northern Plains

The risk of strong, long-tracking tornadoes stretches from Iowa to the eastern Dakotas, much of Minnesota and northwestern Wisconsin. The risk area tonight also extends into neighboring southern Canada.

Large hail, flash flooding, frequent lightning strikes and straight-line wind gusts can also lead to damage and life-threatening situations.

The risk of severe thunderstorms and tornadoes Friday will encompass much of Minnesota, Wisconsin, Iowa and the Upper Michigan Peninsula.

Tennessee Storms

Farther southeast, one or more complexes of thunderstorms grew strong during the afternoon Thursday and now have potential to bring damaging wind gusts, hail and flash flooding from western Kentucky to much of Tennessee, northern Alabama, northern Mississippi and northeastern Arkansas into the evening hours Thursday.

The storms will weaken later at night.

Southern Plains Storms

Farther southwest, a few locally strong thunderstorms can briefly produce hail, gusty winds and a burst of flooding rain over the northern Texas panhandle and western Oklahoma into the evening Thursday.

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Daily U.S. Extremes

past 24 hours

  Extreme Location
High 100° Wink, TX
Low 29° Mullan Pass, ID
Precip 1.17" Chapel Hill, NC

WeatherWhys®

People need to pay close attention to the UV index during this time of year. On a sunny day late in the spring and into the summer, the UV is usually at least an 8, which is very high. Readings over 11 are considered extreme values in which only 10 minutes of full exposure to the sun will produce a sunburn.

This Day In Weather History

New Hampshire (1814)
A tornado crossed Merrimac, Litchfield, Londonderry and North Chester. The same storm produced hailstones that had an 11-inch circumference and weighed 1/2 pound.

Northeast (1989)
More rain in an already wet month. Monthly totals topped 11 inches at New York City, 9 inches at Bridgeport, Conn., and 8 inches at Baltimore (all three totals set records for May).

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