Hot and humid Wednesday through Friday

Our Monday was gorgeous, with highs in the 80s and plenty of sunshine.

The high pressure system that delivered our pleasant weather will move away on Tuesday, and southerly winds will spread moist air northward from Iowa.  Dew point temperatures over southern Minnesota could touch 70 degrees by late Tuesday afternoon.  You'll notice the muggy air!

Highs on Tuesday will be in the 80s over most of Minnesota:

Winds off of Lake Superior will keep highs in the 70s along parts of the north shore.

We could see some thunderstorms Tuesday night and early Wednesday, as a warm front moves through Minnesota. Here is the possible t-storm activity, as depicted by the National Oceanic and Atmospheric Administration’s North American Mesoscale Forecast System:

Steamy Wednesday through Friday

The jet stream shifts northward into Canada on Wednesday, allowing a dome of hot air to spread over the Upper Midwest.

Highs Wednesday will be in the 90s over much of Minnesota:

Thursday will be even hotter:

Some spots could touch 100 degrees on Thursday.

The combination of heat and humidity has prompted an excessive heat watch for much of Minnesota and western Wisconsin from Wednesday through Friday. Much of the north central U.S. has excessive heat watches for the coming days, and heat warnings or advisories have been issued for locations from Missouri to Louisiana:

Here is a summary of our steamy weather from the Twin Cities office of the National Weather Service:

Drink plenty of fluids in the coming days, and avoid strenuous outdoor activities.

This coming weekend will be cooler, with highs in the 80s.