Very hot weather today and Labor Day; much cooler by Wednesday

This is incredibly hot weather for early September.

The average Twin Cities high temperature is 77 degrees this time of year. Most of the metro area will top out in the upper 90s Sunday afternoon and a few spots in the metro could touch 100 degrees. The warmest Sept. 3 high temp in Twin Cities weather records is 97 degrees, set in 1925.

Much of southern and central Minnesota, plus west-central Wisconsin, will see Sunday highs in the upper 90s. A few spots in southern Minnesota could reach triple-digit high temps.

Roughly the northern third of Minnesota will see Sunday highs ranging from lower 90s to upper 80s, but some spots in Cook County that are close to Lake Superior will have lower 80s.

Monday high temps will be in the upper 90s in southern and central Minnesota and in west-central Wisconsin:

Highs in the upper 80s to lower 90s are expected across much of far northern Minnesota on Labor Day, with some 70s up along the North Shore of Lake Superior.

Tuesday will be much cooler to the northwest, with heat lingering in the metro area and in southern Minnesota and west-central Wisconsin:

After highs in the lower and middle 90s on Tuesday, the Twin Cities metro area will see much cooler temps. Metro area highs are projected to be in the mid 70s on Wednesday and Thursday, followed by lower 80s on Friday.

Heat advisory update

A heat advisory continues today through 5 p.m. Tuesday for the Twin Cities metro area and today through 6 p.m. Tuesday for several southeastern Minnesota counties along the Mississippi River.

Heat advisories run from 1 p.m. to 7 p.m this Sunday for additional Minnesota and western Wisconsin counties.

Here are details of the heat advisory that includes the Twin Cities metro area:

URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 249 AM CDT Sun Sep 3 2023 MNZ060>063-068>070-031600- /O.CON.KMPX.HT.Y.0008.000000T0000Z-230905T2200Z/ Hennepin-Anoka-Ramsey-Washington-Carver-Scott-Dakota- Including the cities of Minneapolis, Blaine, St Paul, Stillwater, Chanhassen, Chaska, Victoria, Shakopee, and Hastings 249 AM CDT Sun Sep 3 2023 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 5 PM CDT TUESDAY... * WHAT...Heat index values up to 100. * WHERE...Hennepin, Anoka, Ramsey, Washington, Carver, Scott and Dakota Counties. * WHEN...Until 5 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS...The heat during the day combined with warm temperatures overnight remaining in the mid 70s will provide little recovery time from the heat. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Here are details of the heat advisory for southeastern Minnesota counties and western Wisconsin counties along the Mississippi River:

URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 1052 AM CDT Sun Sep 3 2023 IAZ011-MNZ079-088-096-WIZ032>034-041-042-053-054-041200- /O.CON.KARX.HT.Y.0008.000000T0000Z-230905T2300Z/ Allamakee-Wabasha-Winona-Houston-Buffalo-Trempealeau-Jackson- La Crosse-Monroe-Vernon-Crawford- Including the cities of Waukon, Wabasha, Winona, Caledonia, Alma, Arcadia, Whitehall, Black River Falls, La Crosse, Sparta, Tomah, Viroqua, and Prairie Du Chien 1052 AM CDT Sun Sep 3 2023 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CDT TUESDAY... * WHAT... Prolonged heat. Afternoon heat index values of 95 to 103 degrees expected through Tuesday. Overnight lows will only fall into the low to mid-70s. * WHERE...The warmest conditions are expected along the Mississippi and Wisconsin river valleys and their nearby tributaries over southeast Minnesota, southwest and west- central Wisconsin, and northeast Iowa. * WHEN...Until 6 PM CDT Tuesday with the greatest impacts during the afternoon hours each day. * IMPACTS...Hot temperatures may cause heat illnesses to occur. * ADDITIONAL DETAILS...Humidity values today and Monday will be on the lower side, but do increase for Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take extra precautions if you spend time outside. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Here are details of the heat advisory elsewhere in Minnesota and in western Wisconsin:

URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 249 AM CDT Sun Sep 3 2023 MNZ043>045-049>054-056>059-064>067-073>077-082-083-WIZ014>016-023- 025-027-028-031600- /O.EXB.KMPX.HT.Y.0008.230903T1800Z-230904T0000Z/ Morrison-Mille Lacs-Kanabec-Stearns-Benton-Sherburne-Isanti- Chisago-Lac Qui Parle-Chippewa-Kandiyohi-Meeker-Wright- Yellow Medicine-Renville-McLeod-Sibley-Redwood-Brown-Nicollet- Le Sueur-Rice-Watonwan-Blue Earth-Polk-Barron-Rusk-St. Croix-Dunn- Eau Claire- Including the cities of Little Falls, Princeton, Mora, St Cloud, Sauk Rapids, Elk River, Cambridge, Center City, Madison, Montevideo, Willmar, Litchfield, Monticello, Granite Falls, Olivia, Hutchinson, Gaylord, Redwood Falls, New Ulm, St Peter, Le Sueur, Faribault, St James, Mankato, Osceola, Rice Lake, Ladysmith, Hudson, Menomonie, Chippewa Falls, and Eau Claire 249 AM CDT Sun Sep 3 2023 ...HEAT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 100 expected. * WHERE...Portions of central, east central, south central, southwest and west central Minnesota and northwest and west central Wisconsin. * WHEN...From 1 PM this afternoon to 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS...Wet bulb globe temperatures of 85 to 87 suggest taking 20 minutes of rest for every 1 hour of activity in this heat. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

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

You can check these National Weather Service sites for updated weather info: Twin Cities, Duluth, La Crosse, Wis., Sioux Falls, S.D., and Grand Forks, N.D.

Next rain chance

Parts of northwestern Minnesota could see a passing shower or thunderstorm Monday afternoon and evening.

A better chance of showers and thunderstorms moves into Minnesota Tuesday afternoon into Tuesday night.

The National Oceanic and Atmospheric Administration’s North American Mesoscale (NAM) forecast model shows the potential rain pattern from 5 a.m. Tuesday to 6 p.m. Tuesday:

NOAA’s FV3 forecast model shows a somewhat similar rain pattern, but in addition it moves a rain chance into the Twin Cities metro area and southeastern Minnesota and western Wisconsin Tuesday afternoon & evening:

We could sure use some rain!

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.