First Frost, Freeze for Upper Midwest, Great Lakes

By , Meteorologist
September 18, 2012; 5:07 AM ET
Share |
Frosty windshield photo from Flickr user mwkelley.

Some Midwesterners will wake up to the first frost and freeze of the season this week, while others around the northern Great Lakes may witness the first snow flakes of the season.

Drastically colder air is surging into the Midwest behind a cold front, allowing temperatures to plummet by 20-30 degrees.

Clear and calm conditions behind the front will allow for temperatures to drop near and below freezing across eastern portions of the Dakotas, Minnesota, northern Iowa and northwestern Wisconsin early Tuesday morning.

Fargo, N.D., Aberdeen, S.D., International Falls and Duluth, Minn., are among the cities and towns that will have their first frost or freeze of the season.

Any outdoor plants in pots should be brought inside, gardens should be protected and scrapers should be handy for frosty windshields.

On Wednesday morning, colder air will reach even farther south and east. There is potential for a frost as far south as northern portions of Illinois.

With chilly air moving across the very warm water of the northern Great Lakes, a few snow flakes could fly or mix in with rain showers around the Upper Peninsula of Michigan on Tuesday night. According to the National Oceanographic Data Center, water temperatures are still in the lower 60s in Lake Superior.

While no snow accumulations are expected, seeing snow flakes may catch some off-guard so early in the season.

Comments

Comments left here should adhere to the AccuWeather.com Community Guidelines. Profanity, personal attacks, and spam will not be tolerated.

More Weather News

  • Flash Flood Threat Starts June in Northeast

    June 2, 2015; 5:08 AM ET

    Accompanying the start of Meteorological Summer will be wet weather and the risk of flooding in the Northeast as well as unseasonably cool conditions in New England.

Daily U.S. Extremes

past 24 hours

  Extreme Location
High N/A
Low N/A
Precip N/A

WeatherWhys®

This Day In Weather History

Alexandria, VA (1945)
Severe thunderstorm dropped hailstones the size of oranges in a 20 x 40 mile area, shattering 14,000 window panes.

Southeast (1985)
Scorching temperatures in South Carolina and Georgia. Charleston set an all-time record high of 106 while Savannah set an all-time record for June of 104.

Midwest (1990)
Devastating tornado outbreak kills 9 and injures 250. A man holding onto a mattress was thrown 100 feet.