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There is a chance of thunderstorms through tonight. The National Weather Service says a few of these could be severe, particularly over southeast Missouri and southwest Illinois. The main threat will be damaging winds, with large hail and tornadoes also possible.

After the storms move out, extreme hot weather and humidity move in Thursday through Tuesday.  Afternoon heat indexes over 100 degrees will be possible over parts of the area from Friday through Monday.  Actual air temperatures will reach the low 90s Friday through the weekend until Tuesday.

There is a chance again for thunderstorms on Tuesday.