Most of southern Minnesota is under a heat advisory Tuesday

The heat index will top 100 for some spots

A girl tosses seeds to ducks at a lake.
A girl tosses seeds to ducks at Lake Nokomis during a heat wave in Minneapolis in June.
Tim Evans for MPR News

As dew points increase again Tuesday, the heat index climbs to dangerous levels for much of southern Minnesota.

Tuesday’s forecast

The storms that brought severe weather to portions of northern Minnesota have mostly cleared into Wisconsin as of Tuesday morning. 

There is a very isolated chance a few more storms could develop in southern Minnesota Tuesday afternoon or evening, and if that happens, those storms could also bring large hail and damaging winds.

However, it is likely that most of Minnesota stays sunny through the day Tuesday. 

Although there are a few 50s and 60s north where humidity levels are slightly lower, most of southern Minnesota is starting Tuesday off muggy and warm in the 70s. 

The entire state stays above average for highs, with all but the northeastern corner of the state making it into the 90s.

weather graphic
Tuesday high temperatures
National Weather Service

In southern Minnesota, where the dew points are expected to surge into the 70s by the afternoon that will push the heat index past 100 in some spots. 

weather graphic
Forecast heat index temperatures Tuesday
National Weather Service

Because of the dangerous heat, most of southern Minnesota is under a heat advisory Tuesday. 

weather graphic
Heat advisory Tuesday;, excessive heat watch Wednesday
National Weather Service

Those temperatures and the heat index push even higher Wednesday, and storms become more likely again.

That extended forecast will be updated around 9 a.m.

Programming note

You can hear my live weather updates on Minnesota Public Radio at 7:48 a.m. Monday through Friday morning.

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