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By Anna Skinner
Associate News Editor
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National Weather Service (NWS) meteorologists issued a frost advisory for two states on Thursday as below-average temperatures were expected to dip near freezing overnight.
Why It Matters
The end of summer has brought contrasting weather across the U.S. The dip in temperatures follows a cold front that ushered in autumnal weather across much of the U.S. earlier this week. Many states from the Upper Midwest to the Gulf Coast are experiencing chilly weather.
Read More on U.S.
Meanwhile, abnormally high temperatures have hit the Pacific Northwest and prompted heat-related weather warnings this week.
What to Know
Early Thursday morning, frost advisories were issued for parts of Wisconsin and Michigan. Temperatures were expected to dip as low as 30 degrees overnight.
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In Michigan, the chilly temperatures impact the Upper Peninsula. The frost advisory is in place for Ontonagon, Baraga, Gogebic, Iron, and southern Houghton counties, including the cities of Ontonagon, Sidnaw, Iron River, Ironwood, Kenton, and L'Anse.
The advisory will be in effect from 2 a.m. to 9 a.m. Eastern time on Friday morning.
"Temperatures as low as 30 will result in frost formation," the advisory said. "Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered."
In Wisconsin, the advisory is in place for Villas County, including the cities of Eagle River and Lac du Flambeau. It is in place between 1 a.m. and 8 a.m. Central time on Friday. Temperatures will be as low as 33 to 35 degrees and will result in frost formation. The Duluth, Minnesota, NWS office also issued a frost advisory for Wisconsin's Ashland and Iron counties, including the cities of Hurley and Ashland.
"This includes the Tribal Lands of the northwestern area of the Lac du Flambeau Band and the Bad River Reservation. Other locations including Madeline Island," the advisory said. "Temperatures as low as 35 will result in frost formation."
Although frost advisories are in place for the Upper Midwest, NWS Weather Prediction Center lead forecaster Bob Oravec told Newsweek some of the most significant temperature anomalies are occurring in the Central and Southern Plains this week, such as in Oklahoma, where some locations could see temperatures as cold as 30 degrees below average for this time of year.
What People Are Saying
NWS Green Bay posted on X, formerly Twitter: "Temps tonight will fall into the 30s and 40s making for a chilling Friday morning. Jackets will be needed at the morning bus stop. Vilas County will be the cold spot, where readings may just be cold enough to get some frost. Time to bring in or cover up outdoor plants."
NWS Duluth in a post on X: "Low temperatures tonight into Friday morning will be reaching the 30s in some locations, mainly in the higher elevations of north-central Wisconsin. A Frost Advisory is in effect tonight into early Friday morning for Ashland and Iron Counties."
What Happens Next
The frost advisories are set to expire on Friday morning. Temperatures will likely remain below normal for the next eight to 14 days, according to the NWS Climate Prediction Center, but the three- to four-week temperature outlook shows above-average temperatures across the Upper Midwest.
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