Tornado Watch issued for parts of northwest Wisconsin until 1 AM. Breezy and Cooler; Showers and thunderstorms diminish tonight; Mainly dry Tuesday-Thursday

A tornado watch has been issued for parts of northwest Wisconsin until 1 AM Tonight. This watch includes the following cities…Port Wing, Bayfield, Washburn, Ashland, Hurley, Gile, Minong, Spooner, Shell Lake, Hayward and Winter.

Primary threats include

A couple tornadoes possible
Isolated damaging wind gusts to 70 mph possible

Radar has been showing some strong rotation with the tornado warned storms in northwest Wisconsin late this afternoon.

MRMS radar loop ending at 5:20 PM Monday, September 20, 2021.

Showers and thunderstorms continue to move to the ENE across northeast and eastern Minnesota and northwest Wisconsin, with a threat for severe weather over eastern portions of northwest Wisconsin this evening.

Rain will diminish from SW-NE tonight, but there likely will be pockets of light rain showers and drizzle which linger most of the night, but the widespread heavier rains should end this evening.

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A strong cold front is moving into western Wisconsin late this afternoon. This front along with an upper level trough has been producing widespread showers and some thunderstorms today across the Northland with pockets of very heavy rainfall, along with some severe weather in northwest Wisconsin where a few tornado warnings have been issued late this afternoon for areas around Solon Springs and Minong for radar indicated tornadoes.

Today’s system looks pretty cool on Goes-16 sandwich imagery with convection indicated by the colder cloud tops (brighter colors) lined up from Ontario to eastern Minnesota to central Iowa down to northeast Kansas.

And a look at today’s system per Goes-16 water vapor imagery.

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A much cooler air mass will move into the Northland tonight and Tuesday with 850mb temps bottoming out in the +2 to +4C range on Tuesday.

High temperatures in the Northland will be in the mid 50s to mid 60s on Tuesday, and in the 60s to low 70s for Wednesday.

You know we’re getting into fall when you see a 24 hour temperature change like the one we have today, this is all thanks to a cold front which is moving across the upper Midwest today.

Rainfall Totals from Sunday night and Monday, September 19-20, 2021

Note: Totals listed below are through 4 PM Monday

1 WSW Grand Rapids, MN: 4.75″
4 WSW Warba, MN: 4.00″
1 W Buyck, MN: 3.75″
1 ENE Hill City, MN: 3.30″
1 W Grand Rapids, MN: 2.81″
Hill City, MN: 2.68″
International Falls, MN: 2.24″
Longville, MN: 1.80″
Brainerd, MN: 1.59″
Aitkin, MN: 1.59″
Deer River, MN: 1.57″
Littlefork, MN: 1.37″
Cook, MN: 1.31″
Orr, MN: 1.08″
Solon Springs, WI: 0.67″
Webb Lake, WI: 0.61″
Hinckley, MN: 0.52″
Chisholm-Hibbing Airport: 0.49″
Walker, MN: 0.44″
McGregor, MN: 0.41″
Moose Lake, MN: 0.36″
Cass Lake, MN: 0.34″
Superior Airport: 0.26″
Pine River, MN: 0.26″
Duluth Airport: 0.20″
Minong, WI: 0.20″
Eveleth-Virginia, MN: 0.19″

Tim

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