High winds developed over southern Lake Michigan during the morning of December 11th behind a strong cold front. Peak wind gusts included 59 knots at the Michigan City Harbor; 54 knots at the Harrison Dever Crib and 48 knots at the Montrose Harbor Light.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LOT wrote it up.
High winds developed over southern Lake Michigan during the morning of December 11th behind a strong cold front. Peak wind gusts included 59 knots at the Michigan City Harbor; 54 knots at the Harrison Dever Crib and 48 knots at the Montrose Harbor Light.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Chicago, IL wrote its last area forecast discussion before the first event at Dec 11, 5:30 AM CST, 32 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
3 marine high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Michigan in 2021Every state in 2021This day in weather history
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 995795, 995801, 995815.