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.
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Hazardous Weather Conditions

Last Update: 901 AM CDT Fri Jul 21 2017

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Chicago, IL Local Forecast Office

8NM NE Gary IN

Marine Zone Forecast

Rest Of Today
East winds 5 to 10 kt becoming southeast. Slight chance of showers and thunderstorms. Waves 1 ft or less.
Tonight
South winds 10 to 20 kt. Showers and thunderstorms likely. Waves 1 ft or less.
Saturday
Southwest winds 15 to 20 kt becoming west 10 to 15 kt in the afternoon. Chance of showers and thunderstorms. Waves 1 ft or less.
Saturday Night
Northwest winds 10 to 15 kt. Slight chance of showers and thunderstorms in the evening. Waves 1 ft or less building to 1 to 3 ft after midnight.
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ABOUT THIS FORECAST

Last Update: 901 AM CDT Fri Jul 21 2017
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