The Twin Cities is under a heat advisory, faces 100-degree heat indices

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Hot and humid conditions will persist Friday and Saturday with temperatures expected to reach 90 degrees in many parts of Minnesota.

It will feel even hotter in the Twin Cities as heat indices could reach 100 degrees, all thanks to tropical dew points combined with temperatures surpassing 90 degrees. With that, the National Weather Service has placed the metro area under a heat advisory through 9 p.m. Friday.

The service warns the risk of heat related illnesses will go up for people who spend time outside or don't have an air conditioner.

It recommends taking extra precautions if you work outside, and suggests rescheduling strenuous outdoor activities to early morning or late evening if possible. Wearing light fitting clothing and drinking lots of water is also suggested.

Meteorologist Paul Douglas wrote in his blog that Friday will mark only the third day of the summer with high temps reaching 90. But as hot as Friday will feel, the bulk of the heat is just to the south of Minnesota, he says.

While the Twin Cities is the only area with a heat advisory, the rest of Minnesota will also be hot, with the heat indices reaching 90-95 in every corner of the state Friday – and possibly higher Saturday.

Cooler Saturday night, possibly stormy

After another blistering Saturday day, cooler air is expected to advance into Minnesota after a stormy cool front drives through the state that night into Sunday, according to MPR.

Saturday's storms should develop in the Dakotas before advancing through Minnesota.

The Storm Prediction Center has issued a slight risk for severe thunderstorms in a portion of northwest Minnesota, where high winds are the primary threat with any storms that develop. They should weaken below severe limits as they slide through Minnesota.

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100 degrees? Probably not – but hot

Temperatures won't hit the century mark after all on Thursday, despite earlier predictions. It'll be muggy, though, with a predicted high of 92 Wednesday and 94 on Thursday in the Twin Cities, the National Weather Service says.