Wintry mix spreads across Minnesota

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Saturday could produce the highest heat index values of the hear for parts of southern Minnesota. The Twin Cities National Weather Service office is getting ahead of the game by posting an 

The combination of temperatures in the 90s and dew points approaching 80 degrees will drive heat index values past the 100-degree mark Saturday afternoon. A few models suggest heat index values near 110 degrees across southern Minnesota Saturday.

NOAA’s NAM model is among the most aggressive and cranks out heat index values of 110 from the western Twin Cities into southwest Minnesota Saturday afternoon.

The amount of moisture in air mass Saturday afternoon will rival some of the world’s most oppressive jungles. Several models crank out dew points near 80 degrees for the Twin Cities and southern Minnesota Saturday afternoon.

As dew points approach 80 degrees, the equation for heat index spikes rapidly. A temperature of 93 degrees and a dew point of 80 degrees yields an unbearably dangerous heat index of 112.

Weather and Climate News

Updraft® - Minnesota Weather News

Paul Huttner

Author

One of the hottest days this year is heading for Minnesota Saturday.

Twin Cities National Weather Service

NOAA NAM model forecast heat index for 4 pm Saturday

NOAA via pivotal weather 

NOAA NAM 3 km model dew point forecast for 7 pm Saturday

Excessive heat watch issued for Saturday

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