A strong low pressure area over the northern Great Lakes spread a swath of accumulating snow across southern WI. Roads became snow covered and slippery with some drifting snow via the brisk winds.
Every event with a place to put it; 12 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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 MKX wrote it up.
A strong low pressure area over the northern Great Lakes spread a swath of accumulating snow across southern WI. Roads became snow covered and slippery with some drifting snow via the brisk winds. There were many vehicle slide-offs and accidents reported on highway 16 in Jefferson and Waukesha Counties during the evening, as well as Interstate 94 east of Madison to Waukesha. A lesser number of vehicle slide-offs and accidents occurred over the remainder of southern WI.
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 Milwaukee, WI wrote its last area forecast discussion before the first event at Dec 30, 5:24 AM CST, 5 hours 36 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
12 winter weather. Local standard time, as filed.
Snow accumulations of 1 to 3 inches.
Snow accumulations around 3 inches.
Snow accumulations of 2 to 4 inches.
Snow accumulations of 2 to 3 inches.
Snow accumulations of 3 to 5 inches.
Snow accumulations of 2 to 3 inches.
Snow accumulations of 3 to 4 inches.
Snow accumulations of 4 to 5 inches.
Snow accumulations of 1 to 3 inches.
Snow accumulations of 1 to 3 inches. Many vehicle slide-offs and accidents on highway 16 and I-94.
Snow accumulations 2 to 3 inches. Many vehicle slide-offs and accidents on highway 16 and I-94.
Snow accumulations of 1 to 3 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2019Every state in 2019This day in weather historyWarnings in Wisconsin, December 2019
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: 863713, 863716, 863705, 863715, 863707, 863702, 863708, 863711, 863703, 863709, 863717, 863714.