A frost advisory is in effect from 1 AM to 8 AM Wednesday for portions of north-central, northeast, and east-central Minnesota and northwest Wisconsin including the following locations…International Falls, Bigfork, Grand Rapids, Hill City, Aitkin, McGregor, Pine City, Hinckley, Moose Lake, Cloquet, Duluth, Hibbing, Cook, Orr, Crane Lake, Ely, Isabella, Superior, Solon Springs, Danbury, Grantsburg, Siren, Minong, Spooner and Shell Lake.
Temperatures as low as 34 degrees will result in frost formation.
Frost could kill sensitive outdoor vegetation if left uncovered.
Note: The chances for frost are much lower tonight in the Twin Ports of Duluth and Superior, especially below the hill closer to Lake Superior (within about 10 miles of the lake).
Average dates for first 32 F freeze of the season (1991-2020 Climate Period).
International Falls, MN: September 15
Ashland, WI: September 24
Brainerd, MN: September 25
Duluth, MN: September 30
Note: Hibbing, MN has already had their first 32 F freeze of the season, but on average their first freeze occurs on September 10. This year’s first freeze at Hibbing was on September 6.
This is likely the first of what will be many frost and eventually freeze headlines over the next few weeks as we transition from summer to fall. Here we go!
Low temperature forecast for Wednesday morning, September 22, 2021.
Will probably see a few 20s Wednesday morning in northern Minnesota in the typical cold spots in the area.
High temperature forecast for Wednesday and Thursday, September 22-23, 2021
We’re looking at daytime highs in the mid 60s to around 70 in northeast Minnesota and northwest Wisconsin for Wednesday, and in the mid 60s to low 70s for Thursday, so not too bad at all for late September.
After a few weeks of a more active weather pattern in our area, the weather pattern will quite down significantly through this weekend, with our only chance for a few rain showers coming in the Friday-Saturday time frame due to a cold frontal passage and upper level low which digs SE toward the Great Lakes, but any rain we get should be on the light side and not widespread at all the way it looks now.