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Cooling trend; showers and thunderstorms at times this week

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The high temperature at Minneapolis-St. Paul International Airport was 90 degrees Sunday afternoon.

It was fitting that we had summery weather on the final Sunday of astronomical summer.

Sunset September 16 at Bde Maka Ska, Minneapolis Ron Trenda/MPR News

Sunday was our 20th day this year with an official high temp of 90 degrees or warmer in the Twin Cities. We average 13 days per year with a high of 90 or warmer in the Twin Cities, according to the Minnesota State Climatology Office.

Daily record high temps were set Sunday in Brainerd and International Falls:

Temperature trends

Monday high temps will range from 60s in northern Minnesota to 80s in the southeast:


Tuesday highs will be in the 60s in northern and central Minnesota, with 70s south:


Twin Cities metro area highs are projected to reach the lower 70s Tuesday, followed by around 70 degrees on Wednesday and Thursday. It still looks we could top out in the upper 60s on Friday.

Rain chances

An isolated shower or thundershower is possible in northern and central Minnesota overnight Sunday night.

There will be a chance of scattered showers and thunderstorms in central and southern Minnesota Monday afternoon, with a good chance of some showers and thunderstorms Monday evening and overnight Monday night.

The National Oceanic and Atmospheric Administration’s North American Mesoscale forecast model shows the potential rain pattern Monday afternoon through Tuesday morning:

NOAA NAM simulated radar from Monday afternoon through Tuesday morning, via tropicaltidbits

The color chart to the right of the loop refers to the strength of the signal that returns to the radar, not to the amount of rain.

Periods of showers and thunderstorms are likely on Wednesday and Thursday.

Florence update

Hurricane Florence and it's successors, tropical storm Florence/tropical depression Florence, have dumped some record rainfall amounts in North Carolina:

Details of the rainfall totals:

NWS Eastern Region

Sadly, Florence's fatality total has risen to 17:

Thankfully, additional rains in the Carolinas will be tapering off:

NOAA/National Weather Service Potential additional rainfall from Florence and remnants from Sunday evening through Tuesday

Programming note

You can hear my live weather updates on Minnesota Public Radio at 7:49 a.m. Thursdays and Fridays, and at 7:35 a.m., 9:35 a.m. and 4:35 p.m. each Saturday and Sunday.