What's going on?

Heat Advisory Today
Highs near 90° today with dew points in the mid-seventies has prompted the National Weather Service to issue a Heat Advisory for Central Minnesota, in effect from 1:00 this afternoon through 8:00 tonight.

From the National Weather Service this morning: It will be hot and humid today...
Severe Weather Risk Tonight
After a hot and humid day today, thunderstorms will become likely overnight tonight, some could be severe -- with large hail, damaging winds, and heavy rain.