National Weather Service United States Department of Commerce

Severe Thunderstorms With Heavy Rain Possible In The Upper Midwest; Excessive Heat For Central U.S.

Several rounds of strong to severe thunderstorms will be possible from the northern Plains and upper Midwest to the Great Lakes through Friday. Damaging winds, large hail, and flooding will be the primary threats with these storms. Excessive heat will grip the central Plains with heat indices approaching 105 to 110 degrees. Very hot and humid conditions are likely to expand into the Mid Atlantic. Read More >

Click a location below for detailed forecast.

Last Map Update: Fri, Jul. 21, 2017 at 5:50:17 pm CDT

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With high temperatures nearing triple digits on Saturday, heat index values will climb at or above 105 in many locations during the afternoon hours. The following chart contains the forecast heat index value as we move through the day on Saturday.
The dominant upper level ridge will weaken briefly on Sunday as a weak upper level disturbance moves overhead. This may be enough to allow thunderstorms to fire during the afternoon and evening hours. The best storm chances will be across the eastern counties where moisture levels will be highest. Severe weather is not expected, but storms will be capable of strong downburst winds and small hail. Frequent lightning and brief heavy rain will also accompany the stronger storms. Otherwise, it will continue to be hot and humid with heat indices climbing above 100.
Here are some heat safety tips for you, your family and pets!
Low storm chances are possible northeast of a Sherman-Greenville- Emory line on Tuesday. High pressure will once again build back through the middle and end of next week, resulting in heat index values to rise between 105-110 on Thursday and Friday.

 
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