A large storm system impacted Wisconsin from the evening of Saturday, April 15th into Sunday night, April 16th. Initially, rain and thunderstorms spread through southern Wisconsin before switching over to snow during the morning hours of Sunday, April 16th.
Every event with a place to put it; 9 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 ARX wrote it up.
A large storm system impacted Wisconsin from the evening of Saturday, April 15th into Sunday night, April 16th. Initially, rain and thunderstorms spread through southern Wisconsin before switching over to snow during the morning hours of Sunday, April 16th. Heaviest snowfall occurred in central Wisconsin during the day Sunday, April 16th, where snowfall totals were 22.5 near Longwood (Clark County) and 22.0 near Black River Falls and Northfield (Jackson County). Many trees were beginning to leaf out following record breaking warmth the week prior, and the heavy snow load resulted in tree damage and power outages. The large amount of precipitation associated with this storm greatly impacted flooding along the Mississippi, Black, and Yellow Rivers and ultimately resulted in the Governor of Wisconsin issuing a State of Emergency declaration on April 16.
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 La Crosse, WI wrote its last area forecast discussion before the first event at Apr 16, 11:29 AM CST, 1 minute earlier.
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</html>Hazardous Weather Outlook National Weather Service La Crosse WI 419 AM CDT Sun Apr 16 2023 MNZ088-096-WIZ017-029-032>034-041>044-053>055-061-171100- Winona-Houston-Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse- Monroe-Juneau-Adams-Vernon-Crawford-Richland-Grant- 419 AM CDT Sun Apr 16 2023 This Hazardous Weather Outlook is for portions of southeast Minnesota and southwest into central Wisconsin. .DAY ONE...Today and Tonight Heavy, wet snow accumulations are expected tonight into early Monday morning with 6 to 12 inches of accumulations expected within the heaviest snow band. The snow combined with winds gusting 40 to 50 mph will lead to hazardous travel. A Winter Storm Warning is in effect. .DAYS TWO THROUGH SEVEN...Monday through Saturday Flooding along the Mississippi River has begun for northern sites. Flooding will spread from north to south over the course of the new week and continue for several weeks. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. IAZ008-009-018-019-171100- Mitchell-Howard-Floyd-Chickasaw- 419 AM CDT Sun Apr 16 2023 This Hazardous Weather Outlook is for portions of north central Iowa and northeast Iowa. .DAY ONE...Today and Tonight Wind gusts of 40 to 50 mph are expected today through Monday. A Wind Advisory is in effect. Light, slushy snow accumulations near an inch expected today and tonight. .DAYS TWO THROUGH SEVEN...Monday through Saturday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Snow reports would be appreciated Today into Monday morning. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. IAZ010-011-029-030-MNZ079-086-087-094-095-171100- Winneshiek-Allamakee-Fayette-Clayton-Wabasha-Dodge-Olmsted-Mower- Fillmore- 419 AM CDT Sun Apr 16 2023 This Hazardous Weather Outlook is for portions of northeast Iowa and southeast Minnesota. .DAY ONE...Today and Tonight Slushy snow accumulations of 1 to 3 inches are possible today into tonight with winds gusting 40 to 50 mph. A Winter Weather Advisory is in effect. .DAYS TWO THROUGH SEVEN...Monday through Saturday Flooding along the Mississippi River has begun for northern sites. Flooding will spread from north to south over the course of the new week and continue for several weeks. .SPOTTER INFORMATION STATEMENT... Snow reports would be appreciated Today into Monday morning. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled.
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</html>The national radar mosaic for the moment the first event began.
9 heavy snow. Local standard time, as filed.
Volunteer public observers reported 5 to 9 inches of snowfall across parts of Buffalo County. The highest reported total of 12 inches was recorded near Marshland.
Volunteer public observers reported 8 to 12 inches of snowfall across Trempealeau County. The highest reported total of 17.0 inches was recorded near Ettrick.
Volunteer public observers reported 12 to 18 inches of snowfall across parts of Clark County. The highest reported total of 22.5 inches was recorded near Longwood.
Volunteer public observers reported 12 to 19 inches of snowfall across parts of Jackson County. The highest reported total of 22 inches was recorded near Northfield and Black River Falls.
Volunteer public observers reported 12 to 18 inches of snowfall across parts of La Crosse County. The highest reported total of 20.5 inches was recorded in Mindoro.
Volunteer public observers reported 8 to 12 inches of snowfall across Monroe County. The highest reported total of 16 inches was recorded in Sparta.
Volunteer public observers reported 6 to 8 inches of snowfall across Vernon County. The highest reported total of 10.5 inches was recorded near Westby.
Volunteer public observers reported 6 to 10 inches of snowfall across parts of Juneau County. The highest reported total of 11 inches was recorded in New Lisbon.
Volunteer public observers reported 8 to 12 inches of snowfall across Taylor County. The highest reported total of 20 inches was recorded near Hannibal.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2023Every state in 2023This day in weather historyWarnings in Wisconsin, April 2023
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: 1096034, 1096035, 1096036, 1096037, 1096038, 1096039, 1096040, 1096041, 1096042.