Updraft® - Minnesota Weather News

Update on Monday afternoon/evening thunderstorm chances

Severe weather is possible in some areas

It was a sun-splashed and breezy Sunday.

The Sunday afternoon high temperature at Minneapolis-St. Paul International Airport was 86 degrees. That’s a couple of degrees warmer than the average July 9 Twin Cities high temp.

Most of Minnesota and western Wisconsin had Sunday highs in the 80s, with a few spotty 70s up along the North Shore of Lake Superior.

Monday afternoon highs will reach the lower 90s in much of the southern third of Minnesota plus portions of west-central Wisconsin, with mainly 80s in central Minnesota and 70s in roughly the northern third of Minnesota:

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Monday forecast highs
National Weather Service

Tuesday highs will be mainly in the 70s:

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Tuesday forecast highs
National Weather Service

There will be some 60s in parts of northeastern Minnesota.

Twin Cities metro area highs are projected to reach the upper 70s on Wednesday, then around 80 degrees Thursday followed by lower 80s Friday.

Thunderstorm chances

A Canadian cold front will sag slowly southward Sunday evening and overnight Sunday night, spawning scattered showers and thunderstorms in mainly the northern third of Minnesota. An isolated shower or thunderstorm is also possible in central Minnesota and far northwestern Wisconsin Sunday night.

The NWS Storm Prediction Center shows a marginal risk (darker green) of severe weather Sunday evening and overnight Sunday night in portions of northern Minnesota:

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Severe weather outlook Sunday evening/overnight Sunday night
NWS Storm Prediction Center, Duluth NWS

Marginal risk means that an isolated severe thunderstorm is possible. The potential for severe weather shifts southward for Monday afternoon and evening.

You can hear updated weather information for Minnesota and western Wisconsin on the MPR News network. You can find the latest radar here.

You can also check these National Weather Service sites for updated weather info: Twin CitiesDuluthLa Crosse, Wis., Sioux Falls and Grand Forks.

Thunderstorm chances shift south Monday

The cold front will continue to move slowly southward on Monday, so the best chance of showers and t-storms will shift into the southern half of Minnesota and portions of Wisconsin. The peak timing for showers and thunderstorms will be from mid-to-late afternoon on Monday into Monday evening.

The National Oceanic and Atmospheric Administration’s North American Mesoscale (NAM) forecast model shows the potential rain pattern from noon Monday to 11 p.m. Monday:

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NAM simulated radar from noon Monday to 11 p.m. Monday
NOAA, via Tropicaltidbits.com

If the front slows down a bit, more areas will see thunderstorms Monday afternoon and evening.

NOAA’s Finite-Volumn Cubed Sphere (FV3) forecast model shows the following rain pattern from noon Monday to 11 p.m. Monday:

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FV3 simulated radar from noon Monday to 11 p.m
NOAA, via Tropicaltidbits.com

Check forecast updates.

The NWS Storm Prediction Center shows a marginal risk (darker green) of severe weather Monday afternoon and evening in roughly the southern third of Minnesota, including the Twin Cities metro area, plus parts of Wisconsin:

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Severe weather outlook Monday afternoon/Monday evening
NWS Storm Prediction Center/Twin Cities NWS

The yellow-shaded area in Wisconsin has a slight risk of severe weather during that same time period.

Slight risk means that scattered severe thunderstorms are possible, marginal risk means that an isolated severe thunderstorm is possible.

After Monday evening, the next chance of thunderstorms will be Tuesday night into early Wednesday.

Programming note

You can hear my live weather updates on MPR News at 7:35 a.m., 9:35 a.m. and 4:39 p.m. each Saturday and Sunday.