National Weather Service United States Department of Commerce

Frost Advisory Tonight

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Canadian high pressure and an accompanying Arctic airmass gradually settled over the Upper Great Lakes over the weekend of January 18-21. With such frigid temperatures in place, even light winds were sufficient to produce bitter cold wind chills of 20 to 40 below zero at times for a portion of northern Michigan.

The plunge in temperatures led to area rivers quickly icing up with some minor ice jam flooding occurring in spots. Ice formation was also accelerated on the Upper Great Lakes, especially Whitefish Bay and the Straits region. Many schools across northern Michigan were also closed Monday morning due to the dangerously cold conditions.

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