Freeze Warnings Issued As Midwest Hit by First Major Cold Blast of Fall
The drop in temperatures was considered below normal for this time of year, even as the first day of fall was Tuesday.
A frost advisory has been issued for Tuesday morning in Minnesota, Michigan, and Wisconsin, alongside a freeze warning from the National Weather Service in Marquette, Michigan. Cooler air from Canada is causing temperatures to plummet this week as fall arrives. The NWS issues these alerts to warn residents of temperatures that could damage outdoor plants or harm animals left outdoors.
This is the first freeze warning issued by NWS Marquette this season, with September or early October typically being the time of first freeze. Normal overnight temperatures for this time of year are typically in the 40s, but this week's chill is a bit early. A freeze warning indicates temperatures are expected to fall below 32 degrees Fahrenheit for an extended period, while a frost advisory is issued when temperatures are cold enough for frost to form, even if air temperatures are above freezing.
The Marquette warning goes into effect at 2 a.m. Tuesday for Baraga, Iron, and Southern Houghton counties, with temperatures expected to dip as low as 30 degrees Fahrenheit. The warning advises protecting plants and water pipes from freezing, as well as draining sprinkler systems. Frost advisories were also issued by NWS offices in Duluth, Minnesota; Gaylord and Marquette, Michigan; Grand Forks, North Dakota; and Green Bay, Wisconsin.
The frost advisories and freeze warning will expire once temperatures rise with the sunrise on Tuesday, but more similar warnings may follow as fall weather sets in. Despite the fall season, NOAA predicts a high chance of above-average temperatures across most of the U.S. through October 5.
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