Fall arrives with a heat advisory Friday

Astronomical fall arrives Friday at 3:02 pm CDT. Apparently the atmosphere didn’t get the memo.

Our late season heat surge comes with a heat advisory for the Twin Cities Friday. Temperatures will push past 90 degrees in southern Minnesota including the Twin Cities. Even typically chilly Grand Marias will feel like summer at 77 Friday afternoon.

Image: Twin Cities NWS

URGENT – WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
258 PM CDT Thu Sep 21 2017

…Abnormally hot conditions expected on Friday for the Twin
Cities Metro area…

Hot and humid air will yield maximum heat index values from 95 to 100 degrees across the Twin Cities metro area on Friday afternoon. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible, especially for those who are active outdoors.

…HEAT ADVISORY IN EFFECT FROM 1 PM TO 7 PM CDT FRIDAY…

The National Weather Service in Twin Cities/Chanhassen has issued
a Heat Advisory, which is in effect from 1 PM to 7 PM CDT Friday.

* TEMPERATURE…lower 90s.

* HEAT INDICES…95 to 100.

Heat pump

Low pressure in the Dakotas pumps an unusually warm air mass north into Minnesota. The Canadian GEM model and Euro are farther west with the system over the weekend than the U.S. GFS model. If that verifies, the focus for scattered showers and T-Storms will favor the eastern Dakotas into western and northern Minnesota. Sunday could be another hot and humid day like Friday if the western solution comes to pass.

Canadian GEM model via tropical tidbits.

Severe risk west

The best chance for severe storms favors western and northern Minnesota.

Twin Cities NWS

Near record heat Friday

The record high temperature at MSP is 95 degrees Friday. We may fall short of that, but it’s going to be toasty. I have a hunch Sunday’s forecast high of 84 could be conservative.

NOAA via Weather Bell

Cooler breezes next week

The upper air pattern buckles with northwest flow and a shot of cooler air next week.

NOAA

Our breezes next week will be noticeably cooler. Highs in the 50s and 60s will be common statewide. I still think we’ll see more 70s, and probably another shot at 80 once again before the snow flies.

NOAA via Meteostar

Stay tuned.