A strong spring storm at the end of March resulted in over an inch of rain falling on a deeper than average snowpack in central and northern Wisconsin. 32 ft above flood stage.
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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 ARX wrote it up.
A strong spring storm at the end of March resulted in over an inch of rain falling on a deeper than average snowpack in central and northern Wisconsin. The Yellow River near Necedah slowly rose over the following days and crested at 16.32 ft during the evening of April 3rd, which is 1.32 ft above flood stage. Two subsequent crests on April 7th and April 8th were 0.09 ft and 0.4 ft above flood stage, respectively.
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 3, 4:12 AM CST, 4 hours 18 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 512 AM CDT Mon Apr 3 2023 .DISCUSSION...(Today through Sunday) Issued at 316 AM CDT Mon Apr 3 2023 Key Messages: - Severe storms possible into parts of northeast IA and southwest WI late Tuesday/Tuesday night, although the northward extent of the greater risk could still shift a bit. - Strong winds expected on Wednesday with gusts potentially near or above 50 mph for some areas. Today-Tonight: A cold front has shifted south of the area into MO/IL where it will stall out before lifting back north as a warm front on Tuesday. Seasonable temps and lighter winds are on tap for today with mid/high clouds streaming through. Showers are possible by later this afternoon into tonight across northeast IA/southwest WI with mid-level frontogenesis/warm advection north of the surface boundary. Tuesday-Thursday: Severe weather/strong wind potential The bulk of the impactful weather this week will be during the mid- week period as a strong low pressure system lifts from the central plains towards western Lake Superior. Showers will spread northeastward on through the day on Tuesday within strong warm advection ahead of the advancing warm front. Increasing elevated instability and deep layer moisture will result in some thunder during this time, but severe storm potential looks low with these storms. Small hail could not be ruled out, though, with steep mid- level lapse rates advecting northeastward. A period of freezing rain/wintry mix could occur near onset across north-central WI depending on the speed of low-level warming with NBM probabilities of a glazing around 20-30% across Taylor County Tuesday afternoon/evening. There are still some remaining questions which affect the overall risk for severe storms late Tuesday afternoon/night across the forecast area, but the most likely area for potential impacts once again is across northeast Iowa and southwest Wisconsin. Most guidance holds the warm front south of the local area through early evening before trying to bring it northward into the southern/eastern portions of the area ahead of the advancing cold front overnight. The northward extent of the warm front will be critical in severe storm potential. Soundings along/south of the warm front show long, looping hodographs. The higher probabilities for surface based CAPE > 1000 J/kg based on the HREF reach the I-80 corridor by late Tuesday. This environment strongly supports supercells, capable of all hazards. Although the convective evolution and coverage is still in flux, the HREF suggests increasing warm sector development during the afternoon/evening across eastern IA/MO/western IL with storms lifting northeast. Additional storms tied to the cold front could reach the area later in the evening/overnight as large scale ascent increases. The highest severe weather threat will be tied to storms along/south of the warm front, but any of the cold frontal storms interacting with the warm front/warm sector could pose a severe weather risk overnight. Hail/strong winds are possible with storms that cross to the cool side of the boundary. Will have to monitor trends as more high res guidance becomes available through the day. As the occluding low pressure system passes to the north on Wednesday, strong low-level cold advection will aid in deep mixing to above 850 mb. With strong and fairly unidirectional W/SW gradient flow, winds will be strong/gusty. The EPS shows mean peak wind gusts near or above 50 mph south of the low across southern MN/northern IA into parts of WI. Gusty winds will persist into Thursday as the low continues to pull away and cooler air spreads into the region. Friday-Sunday: Warming A quieter late week period is expected as the flow aloft deamplifies and high pressure overspreads the region. By next weekend some precip chances could return as low-level southerly flow develops within the quasi-zonal flow aloft. Predictability in the evolution of embedded troughs at this juncture is low, so held with lower (20%) precip chances for now. Temps will gradually warm into next weekend with readings back near or above 60F for many. && .AVIATION...(For the 12Z TAFS through 12Z Tuesday morning) Issued at 512 AM CDT Mon Apr 3 2023 VFR conditions expected through much, if not all of this TAF period with mainly just mid/high clouds. A sprinkle or shower could not be ruled out, especially tonight, but no aviation impacts are expected. Ceilings will begin to lower overnight with higher rain/thunder chances heading into Tuesday. Winds will gradually shift northwest today and then easterly through the night tonight. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. && DISCUSSION...JM AVIATION...JM
Hazardous Weather Outlook National Weather Service La Crosse WI 402 AM CDT Mon Apr 3 2023 WIZ017-029-033-034-041>044-041315- Taylor-Clark-Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams- 402 AM CDT Mon Apr 3 2023 This Hazardous Weather Outlook is for portions of west central into north central Wisconsin. .DAY ONE...Today and Tonight Runoff from widespread rainfall and melting snow will lead to river rises early this week with flooding along a few rivers. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible Tuesday into Tuesday night. The probability for organized severe storms is low. Strong winds are likely Wednesday into Wednesday night with gusts as high as 45 to 55 mph, highest in open areas. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. MNZ079-086>088-094>096-WIZ032-041315- Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Buffalo- 402 AM CDT Mon Apr 3 2023 This Hazardous Weather Outlook is for portions of southeast Minnesota and west central Wisconsin. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible Tuesday into Tuesday night. The probability for organized severe storms is low. Strong winds are likely Wednesday into Wednesday night with gusts as high as 45 to 55 mph, highest in open areas. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. IAZ008>011-018-019-029-030-WIZ053>055-061-041315- Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Vernon-Crawford-Richland-Grant- 402 AM CDT Mon Apr 3 2023 This Hazardous Weather Outlook is for portions of northeast Iowa and southwest Wisconsin. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible Tuesday into Tuesday night. A few storms could become severe Tuesday afternoon into Tuesday night with damaging winds, large hail, or an isolated tornado possible. Strong winds are likely Wednesday into Wednesday night with gusts as high as 45 to 55 mph, highest in open areas. .SPOTTER INFORMATION STATEMENT... A few spotter groups may be requested Tuesday afternoon or evening. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Yellow River near Necedah crested at 16.32 ft on April 3rd, which is 1.32 ft above flood stage. Two subsequent crests followed over the next few days, both less than 0.5 ft above flood stage.
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 2026-09-24. Each event’s entry at NCEI: 1096447.