Chilly start to the week; wettest day will be Wednesday

Frost advisories until 8 a.m. Monday in parts of Minnesota and western Wisconsin

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Sunday in St. Paul
Ron Trenda/MPR News

We had a mix of sun and clouds on Sunday, along with cool temps. The Sunday high at Minneapolis-St. Paul International Airport was 59 degrees. That’s well short of our average May 22 Twin Cities high of 71.

Low temps will drop into the 30s late Sunday night and early Monday morning across roughly the northern half of Minnesota and much of western Wisconsin:

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Forecast low temps late Sunday night/early Monday morning
National Weather Service

There could be spotty upper 30s elsewhere. Most of the Twin Cities metro area is expected to see lows in the lower 40s.

When winds are light, the temperature near the ground can be several degrees colder than the official temp which is measured 5 feet above the ground.

Frost advisories

Frost advisories (shaded blue in the following three maps) start at 11 p.m. Sunday and run to 8 a.m. Monday from northeastern Minnesota through northwestern Wisconsin. Frost advisories start at 2 a.m. Monday and run through 8 a.m. Monday from northwestern Minnesota through portions of central Minnesota and west-central Wisconsin:

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Frost advisory (shaded blue) through 8 a.m. Monday
National Weather Service
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Frost advisory (shaded blue) through 8 a.m. Monday
National Weather Service
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Frost advisory (shaded blue) through 8 a.m. Monday
National Weather Service

The 7-county Twin Cities metro area is not included in a frost advisory, but a few spots around the outer fringes of the metro area could see some patchy frost.

You can hear updated weather information for Minnesota and western Wisconsin on the Minnesota Public Radio News network, and you can see updated weather info on the MPR News live weather blog.

Green-shaded areas on the three maps above are flood warnings. You can get updated info on the flood warning areas by clicking on the maps on the DuluthGrand Forks, and Twin Cities NWS web sites.

Temperature trends

Monday highs will be mainly in the 60s, with a few upper 50s possible in northeastern Minnesota:

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Monday forecast highs
National Weather Service

Twin Cities metro area metro area highs are projected to reach the mid 60s Monday and Tuesday, then upper 50s on Wednesday followed by upper 60s Thursday and mid 70s on Friday. It still looks like we’ll see 70s next weekend.

Rain chances

Western Minnesota could see some scattered showers late Monday afternoon and Monday evening. The National Oceanic and Atmospheric Administration’s High-Resolution Rapid Refresh forecast model shows the potential precipitation pattern from noon to 11 p.m. Monday:

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

Another area of showers is expected to creep into southern Minnesota late on Tuesday. Periods of rain are likely across much of Minnesota and western Wisconsin on Wednesday. The weather could be a bit unsettled next weekend, with a chance of showers and thunderstorms. Check forecast updates as we get closer to the weekend.

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.