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Updraft® - Minnesota Weather News
Paul Huttner

Sauna: Heat index hits 110 degrees with 81-degree dew point in Hallock

Heat index hits 100 degrees at several locations

2 p.m. hourly weather observations at Hallock, Minn.
2 p.m. hourly weather observations at Hallock, Minn.
NOAA

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It’s back.

Dew points over 80 degrees have returned to Minnesota. This time it’s Hallock, in the far northwest corner of the state.

At 2 p.m. Friday, weather sensors at Hallock record a temperature of 91 degrees with a dew point of 81 degrees. This calculates to an oppressive heat index of 110 degrees.

Weather conditions at Hallock, Minnesota
Weather conditions at Hallock, Minnesota
NOAA

Heat index values at several Minnesota locations are at or above 100 degrees this Friday afternoon.

Minnesota is riding the northern zone of a steamy tropical air mass feeding north from the Gulf of Mexico. This update appears to have pushed the heat index at Hallock even higher, to 111 degrees.

Heat index values Friday
Heat index values Friday
Oklahoma Mesonet

Here are some temperature / dew point/ heat index values a few sites as of 2 p.m. Friday.

  • Lakeville: 90 / 75 / 100

  • Warroad: 88 / 79 / 102

  • Granite Falls: 91 / 77 / 103

  • Madison: 93 / 75 / 104

Peak heat index values Friday will hover over 100 degrees across most of Minnesota.

Forecast maximum heat index Friday
Forecast maximum heat index Friday
Twin Cities National Weather Service

Heat advisories cover most of Minnesota. An excessive heat warning also covers the Red River Valley. The excessive heat warning remains in effect for the greater Twin Cities area until 8 p.m. Friday.

URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN

146 PM CDT Fri Jul 24 2020

Hennepin-Anoka-Ramsey-Washington-Carver-Scott-Dakota- Including the cities of Minneapolis, Blaine, St Paul, Stillwater, Chanhassen, Chaska, Victoria, Shakopee, and Hastings

146 PM CDT Fri Jul 24 2020 ...

EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT SATURDAY...

* WHAT...Dangerously hot conditions with heat index values up to 103. Low temperatures tonight are only expected to fall to 75 to 80 degrees, providing little or no relief from the heat.

* WHERE...Washington, Ramsey, Anoka, Hennepin, Dakota, Scott and Carver Counties.

* WHEN...Until 8 PM CDT Saturday.

* IMPACTS...Extreme heat and humidity will significantly increase the potential for heat-related illnesses, particularly for those working or participating in outdoor activities.