Warm, Windy, and turning more Humid Sunday (near record warmth possible) Rain chances return Sunday night-Monday night

An upper level ridge will move over the upper Midwest on Sunday bringing with it a very warm air mass, but this won’t last long as a trough currently over the Pacific northwest moves east across our area on Monday. Much cooler temperatures will move into our area behind that trough during the early part of next week.

Highs in the 80s are likely in the Northland on Sunday which is 20-25 degrees above average for mid-September.

Note: For warm weather fans, I don’t think Sunday will be the last warm day we see this year around here, although we might not hit 80 again this year (after Sunday), I still think will have a few more days in the 70s in the coming weeks.

Parts of the Northland saw some pretty chilly temperatures Saturday morning, but on Sunday it’s all about the warmth, in fact we may see near record warmth on Sunday – Here are the record high temperatures for September 19th.

Duluth, MN: 90 F set in 1984
Brainerd, MN: 88 F set in 1940
Ashland, WI: 87 F set in 1940 and 1985
Hibbing, MN: 87 F set in 1987
International Falls, MN: 86 F set in 1914 and 1970

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Isolated strong to severe thunderstorms (dark green area on map) are possible Sunday evening and overnight across parts of north-central Minnesota with large hail to 1″ in diameter and damaging wind gusts to 60 mph being the primary threats. This storm risk is due to a strong upper level trough and cold front which will move closer to the upper Midwest Sunday night. A strong SW low level jet ahead of this system will draw humid and unstable air northward, while the lift provided by the approaching trough and frontal boundary leads to the development of showers and thunderstorms over northern Minnesota Sunday night.

  • Rain chances will be highest across northern Minnesota Sunday night.
  • Rain chances increase mid to late Monday morning into Monday afternoon for northeast and eastern Minnesota, and all of northwest Wisconsin.
  • Scattered thunderstorms are also likely on Monday, but the threat for severe weather is on the low side.
  • Rain ends from west to east Monday night.

Note: Rain chances increase after 9 AM Monday in Duluth and Superior, with a rainy Monday afternoon and early evening likely the way it looks now.

18z NAM 3km model simulated radar forecast valid from 1 PM Sunday to 1 AM Tuesday.

We’re still looking at a chance for widespread rainfall totals of an inch in northeast Minnesota and northwest Wisconsin from Sunday night through early Tuesday morning, with more than 2″ of rain possible over parts of northern Minnesota.

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Low Temperature Reports from Saturday morning, September 18, 2021

2 E Celina, MN: 29 F
Hibbing, MN: 30 F
Brimson, MN: 30 F
Embarrass, MN: 31 F
Ely, MN: 32 F
Babbitt, MN: 32 F
Eveleth, MN: 32 F
Ashland, WI: 33 F
Cook, MN: 34 F
Crane Lake, MN: 34 F
Longville, MN: 34 F
Aitkin, MN: 34 F
McGregor, MN: 34 F
Solon Springs, WI: 34 F
Floodwood, MN: 34 F
3 E Orr, MN: 34 F
Hayward, WI: 35 F
International Falls, MN: 36 F
Grand Marais Airport: 36 F
Bigfork, MN: 36 F
Pine River, MN: 36 F
Superior Airport: 36 F
Two Harbors, MN: 37 F
Moose Lake, MN: 37 F
Hinckley, MN: 37 F
Cloquet, MN: 37 F
3 E Wright, MN: 37 F
Butternut, WI: 37 F
Grand Rapids, MN: 38 F
Hurley, WI: 38 F
Brainerd, MN: 39 F
Siren, WI: 39 F

Tim

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