Record or Near Record Cold possible tonight with a widespread frost/freeze; milder temps return this weekend into next week

A cold night ahead across the Northland, in fact International Falls and Hibbing have a chance at tying their record low for September 17th, or possibly even setting a new record low temperature for September 17th.

Here are the Record Low Temperatures for September 17th

International Falls: 24 F set in 1959

Brainerd: 24 F set in 1918

Hibbing: 26 F set in 2011

Ashland: 26 F set in 1959

Duluth: 28 F set in 1959

-Freeze Warning (dark blue area on map) in effect from Midnight tonight to 8 AM Thursday including the following cities…International Falls, Bigfork, Grand Rapids, Walker, Hill City, Aitkin, McGregor, Hinckley, Moose Lake, Cloquet, Duluth, Hibbing, Cook, Ely, Two Harbors, Isabella, Grand Marais, Superior and Solon Springs.

Sub-freezing temperatures ranging from 25 to 29 degrees, coldest across the Iron Range. Frost and freeze will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

-Frost Advisory (light blue area on map) in effect from Midnight tonight to 8 AM Thursday including the following cities…Leader, Brainerd, Washburn, Bayfield, Ashland, Hurley, Minong, Spooner, Shell Lake, Hayward, Winter, Siren, Danbury and Grantsburg.

Temperatures as low as 33 degrees will result in frost formation. Frost could kill sensitive outdoor vegetation if left uncovered.


A chilly air mass covered much of central Canada today with 850mb temperatures as low as -10C while 500mb heights have dropped to as low as 516 meters this afternoon (that’s winter type stuff right there!)

Slightly milder conditions farther south today, although the 0C 850mb temperature contour has made it into northwestern Minnesota this afternoon.

Here’s a look at Wednesday afternoon temperatures.

Temperatures were in the 50s across northern Minnesota this afternoon which is around 10 degrees below normal for mid-September, but temperatures across east-central Minnesota and northwest Wisconsin including in the Twin Ports were in the low to mid 60s this afternoon which is near normal to a few degrees below normal for this time of the year.

Note: Highs Thursday and Friday are expected to be in the 50s in northeast Minnesota and northwest Wisconsin.

Tuesday’s warm weather in Duluth has been replaced by a more typical air mass for mid-September. These cool temperatures will stick around for a few more days.


Widespread thick wildfire smoke which covered the Northland on Tuesday has been pushed farther to the south and out of our area this afternoon thanks to a northwesterly wind. We should remain smoke-free over the next few days, but there is a chance that some wildfire smoke could return to the Northland this weekend, and also next week.

Loop ends around 4 PM Wednesday, September 16, 2020.


Still seeing very good model agreement on next week’s pattern, and it is a warm one for northeast Minnesota and northwest Wisconsin as an upper level ridge sets up to our SW, however, if this ridge sets up farther west, then that could open the door for cooler temperatures to move into our area next week. Stay tuned.

Note: Several days next week could have afternoon temperatures in the 70s to around 80 degrees in northeast Minnesota and northwest Wisconsin.


Thanks for reading!


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