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Frost Advisory Tonight

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Overview

A 1010mb surface low slowly tracked over the Great Lakes Thursday night into early Friday October 23rd morning. Abnormally high amounts of atmospheric moisture combined with lift from the low pressure system created a prolonged stretch of moderate to heavy rain from late Thursday afternoon through Friday. The swath of heaviest rain totaling 3.5 to 5 inches fell from near Grand Traverse Bay over to Gaylord. COOP weather stations in both Traverse City and Gaylord received their second highest 24-hour rain totals, of 3.75” and 4.49” respectively. There was a large gradient in rainfall totals across the area, with some areas near Saginaw Bay receiving less than a tenth of an inch through Friday morning. Many area rivers saw significant rises from this event, with some approaching or breaking long-time records.

Once the low pressure system moved off to the east a tightened pressure gradient resulted in northwest winds gusting to 40 mph, leading to minor lakeshore flooding on shores of northwest Lower Michigan. Much colder air rapidly moved in behind the cold front with some lake effect rain/snow showers lingering through Friday night.

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Radar Loop 2:00 PM Oct 22nd - 8:00 AM Oct 23rd, 2020
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