Oppressive heat Friday in Minnesota, nasty storms could follow

The Twin Cities could reach a heat index value of 110 degrees.
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The hottest day of the year is inching closer as high temperatures on Friday will climb into the 90s, approaching 100 degrees in some areas of Minnesota. 

In Minneapolis, the forecast high for Friday is 99 degrees. If that's not oppressive enough for you, consider that tropical humidity with dew points in the 70s could make it feel like it's 110 degrees. 

"Highs in the 90s and dew points in the 70s will produce heat indices of 100 to 110 Friday afternoon," the National Weather Service says. "The worst conditions are expected just ahead of a cold front across eastern/southern Minnesota and western Wisconsin where highs in the upper 90s are possible." 

Thick, juicy, oppressive air that doesn't come around all that often in Minnesota, although it seems like it's been here quite a bit of late. 

According to the DNR's Climate Journal, the highest heat index in Twin Cities history is 119 degrees. It happened July 19, 2011 when the air temperature of 95 degrees was coupled with a record dew point of 82. 

The heat index reached 112 degrees in the Twin Cities on July 4, 2012 thanks to an air temp of 101 and a dew point of 72. 

Severe storms are also possible Thursday night in northern Minnesota and again Friday and Saturday across portions of the state, including the Twin Cities metro area. 

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