A large storm system impacted northeast Iowa from the evening of Saturday, April 15th into Sunday night, April 16th. Initially, rain and thunderstorms spread through northern Iowa before switching over to snow during the morning hours of Sunday, April 16th.
Every event with a place to put it; 4 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 northeast Iowa from the evening of Saturday, April 15th into Sunday night, April 16th. Initially, rain and thunderstorms spread through northern Iowa before switching over to snow during the morning hours of Sunday, April 16th. The mix of rain and snow resulted in variable snowfall amounts from 0 inches across Floyd, Howard, and Mitchell counties to 8 inches near Elkader (Clayton County) and 6.8 near Churchtown (Allamakee County).
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 hour 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.
4 heavy snow. Local standard time, as filed.
Volunteer public observers reported 4 to 6 inches of snowfall in Winneshiek County. The highest reported total of 7.5 inches was recorded near Decorah.
Volunteer public observers reported 4 to 6 inches of snowfall in Allamakee County. The highest reported total of 8.0 inches was recorded near Churchtown.
Volunteer public observers reported 2 to 5 inches of snowfall in Fayette County. The highest reported total of 6.0 inches was recorded in Wadena.
Volunteer public observers reported 2 to 5 inches of snowfall in Clayton County. The highest reported total of 8.0 inches was recorded in Monona and Elkader.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2023Every state in 2023This day in weather historyWarnings in Iowa, 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: 1094625, 1094617, 1094623, 1094619.