Storms start to move out of Minnesota, continue for western Wisconsin

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Meteorological summer runs from June through August. It’ll feel truly summery the next couple of days.

Sunday highs will reach well into the 90s across most of Minnesota, and a few spots in west-central Minnesota could top 100 degrees. This will probably be one of the warmest Juneteenths that you’ll ever see.

Northeastern Minnesota and western Wisconsin will see mainly 80s, with some 70s and a few 60s near Lake Superior. 

Sunday afternoon dew points will be in the sticky upper 60s in much of Minnesota, with steamy 70s in the southwest.

Heat index values will be around 100 degrees in many parts of Minnesota Sunday afternoon.

Here’s a good explanation of heat index, from NOAA:

Monday highs will be in the upper 90s in many spots:

A few triple-digit highs are possible Monday afternoon, even in the Twin Cities metro area.

Monday dew points will reach the upper 60s to around 70:

The combination of heat and humidity will create heat index values over 100 in many  locations both Sunday and Monday.

Excessive heat warnings and heat advisories begin on Sunday

An excessive heat warning begins at 1 p.m. Sunday in the Twin Cities metro area, and ends at 1 a.m. Tuesday. There is also an excessive heat warning for that same time period in portions of west-central Minnesota, with heat advisories elsewhere in central and much of southern Minnesota:

Here are details of the excessive heat warning:

You may wonder why the excessive heat warning continues overnight, even though heat index values taper off overnight. That’s because overnight lows in many areas will be in the upper 70s to lower 80s and the sticky dew points will stay with us. Many houses and apartments without air-conditioning will stay hot overnight, making it hard to sleep.

There’s also an excessive heat warning for several counties in northwestern Minnesota on Sunday, with additional northwestern Minnesota counties in a heat advisory (orange):

Here are details of the excessive heat warning in portions of northwestern Minnesota:

North-central Minnesota and a small part of northeastern Minnesota are in a heat advisory Sunday afternoon and evening:

You can hear updated weather information for Minnesota and western Wisconsin on the Minnesota Public Radio News 

, and you can see updated weather info on the MPR News 

Here are some safety reminders to keep in mind during hot, humid weather:

Here are the symptoms of heat exhaustion and heat stroke:

Twin Cities metro area highs are projected to reach the lower 90s on Tuesday, followed by mid 80s Wednesday, then lower 90s Thursday and Friday.

Portions of far northern Minnesota could see a passing shower or isolated thunderstorm today. The Twin Cities metro area may have to wait until late Monday for scattered showers and thunderstorms.

Scattered showers and thunderstorms could develop in western Minnesota by mid to late Monday afternoon, then spread to the east-northeast Monday evening and overnight Monday night.

The National Oceanic and Atmospheric Administration’s North American Mesoscale (NAM) forecast model shows the potential rain pattern from 3 p.m. Monday to 6 a.m. Tuesday:

NOAA’s High-Resolution Rapid-Refresh (HRRR) model depicts the most numerous areas of rain shifted a bit to the northwest Monday afternoon through Monday night:

The last time the official Twin Cities high temp hit 100 degrees (at MSP Airport) was on May 28, 2018. That was on Memorial Day.

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.

Ron Trenda

Author

Temperatures and dew points ramp up Sunday afternoon, and it’ll also be steamy on Monday. We have details on the excessive heat warnings and heat advisories.

Heat warnings and advisories in many areas today through Monday

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