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Warmer temperatures the next few days; almost steamy Monday afternoon

Sunday morning dense fog in some areas

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Some of us will have lingering areas of dense fog this Sunday morning, and dense fog advisories continue through mid-morning from west-central Minnesota through east-central Minnesota and portions of west-central Wisconsin. The fog is expected to burn off in most areas by late morning. A dense fog advisory continues until 10 a.m. this Sunday in Traverse and Big Stone counties of west-central Minnesota and until 11 a.m. in Cass and Crow Wing counties of northern Minnesota and in portions of southwestern Minnesota.  You can check the National Weather Service map for updates on the fog.

Temperature trends

Our average Twin Cities high temperature is 72 degrees in mid-September. We’ll blow right past that today, reaching around 80.  Highs are expected to reach 80 or warmer in about the southern third of Minnesota this afternoon, with mostly 70s elsewhere in Minnesota plus western Wisconsin.

Most of Minnesota and western Wisconsin will see highs in the 80s Monday afternoon:

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Monday forecast highs
National Weather Service

It’ll be cooler in the northeast, with 70s and even some 60s near Lake Superior.

Humidity levels will be almost summery Monday afternoon, with dew points in the upper 60s to lower 70s across the southern half of Minnesota and western Wisconsin by Monday afternoon.

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

Rain chances

Some spotty Sunday morning drizzle is possible in areas with the thickest fog, but most of us will have a dry Sunday. Monday is looking rain-free in most locations.  Forecast models show a shower/isolated thunderstorm chance Tuesday, Tuesday night and early Wednesday.  Our rain chance in the Twin Cities will probably hold off until Tuesday afternoon. 

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

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NOAA NAM simulated radar Tuesday morning through Wednesday morning
Tropicaltidbits.com

As always, updated weather information can be heard on the MPR network, and you’ll also see updated weather info on the MPR News live weather blog.

Weather radar upgrade

The National Weather Service weather radar in Chanhassen, Minnesota remains out of service as a major upgrade continues.

Some substantial progress was made on Saturday:

According to the National Weather Service:

  • The radar pedestal is necessary for antenna rotation and positioning to capture data in all directions.

  • The current pedestal being replaced is more than 20 years old, and this refurbishment is necessary to keep the radar functioning for another 20 years or more.

Tropical Storm Humberto

Tropical Storm Humberto is moving slowly away from the northwestern Bahamas. The National Hurricane Center forecasts this track for the center of Humberto over the next few days:

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Forecast track of Tropical Storm Humberto
NWS National Hurricane Center

Here’s a portion of the Sunday morning update from the National Hurricane Center:

Humberto is moving toward the north-northwest near 7 mph (11 km/h). A slow north-northwestward to northward motion is expected over the next 24 hours. A sharp turn to the northeast is expected on Monday. On the forecast track, the center of Humberto should continue to move well offshore of the east coast of Florida during the next day or so and then move away from the U.S. Maximum sustained winds are near 60 mph (95 km/h) with higher gusts. Strengthening is expected during the next few days, and Humberto is forecast to become a hurricane later today or tonight.

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.