Several rounds of heavy rainfall occurred across portions of north central Kansas on 4/10 and 4/11. This resulted in up to 11 inches of rainfall across portions of Marshall county by the early morning hours on 4/11.
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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 TOP wrote it up.
Several rounds of heavy rainfall occurred across portions of north central Kansas on 4/10 and 4/11. This resulted in up to 11 inches of rainfall across portions of Marshall county by the early morning hours on 4/11. Roads were closed in the area and several people were stranded at a campground. Later in the afternoon, additional severe storms caused large hail to around a half dollar size.
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 Topeka, KS wrote its last area forecast discussion before the first event at Apr 11, 5:20 AM CST, 1 hour 22 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Topeka KS 620 AM CDT Sat Apr 11 2026 .KEY MESSAGES... -Multiple opportunities for thunderstorms from this weekend into late next week. -Severe storms are possible with any development this afternoon and again Sunday afternoon. -Temperatures are warm next week. && .DISCUSSION... Issued at 304 AM CDT Sat Apr 11 2026 Scattered convection early this morning is occurring along the nose of the LLJ, and will shift northward into Nebraska by mid-morning. MUCAPE around 500 J/kg and about 25 kts of effective inflow shear could result in some small hail and brief gusty winds with storms early today. Isolated flooding could also occur, especially in north- central and far northern KS. Later today, a warm front moves northward through the area, allowing for theta-e advection and an associated increase in instability. A few CAMS show isolated thunderstorm development in the warm sector after 20Z, but given the overall lack of forcing, have kept POPs low in the 20 to 30 percent range. If, however, a few storms do develop, they could strengthen to severe criteria given 1000-2000 J/kg of SBCAPE and around 30 kts of effective shear. At least a low risk for a tornado or two also exists, especially in far northern KS and into Nebraska where hodographs show more low level clockwise curvature, resulting in 150-200 of sfc-3km SRH. A brief break in precipitation could occur tonight before POPs increase again Sunday morning as a weak shortwave trough embedded in the southwest flow moves over eastern KS. This would just be rain with some embedded storms, but nothing severe. A dryline will then set up in central KS by Sunday afternoon. Overall forcing again looks weak, but if storms form near the dryline later in the day, severe weather would again be a concern due to steep lapse rates, 2000+ J/kg of MLCAPE and at least 30 kts of deep layer shear. A similar setup is expected Monday with a dryline in central KS, but once again, there is a lack of large scale ascent, and the cap looks to hold much of the day. Thus, the current thinking is that conditions will stay dry Monday. A more notable H5 wave will bring better forcing late Tuesday and Tuesday night, which appears to be the next best chance for additional thunderstorm activity. Temperatures should stay on the warm side of average through midweek with highs in the 80s from Monday through Thursday. Another storm system could bring storms back to the region on Friday. && .AVIATION /12Z TAFS THROUGH 12Z SUNDAY/... Issued at 616 AM CDT Sat Apr 11 2026 Storms will likely stay north of terminals this morning, but there is a low chance (20-30%) for isolated storms this afternoon. Confidence is not yet high enough to include TS later today. IFR/LIFR CIGS will linger until midday, when MVFR CIGS are expected. Continued improvement to VFR is likely by mid-afternoon. Southeast winds will veer to the south through the morning and will increase to 10-15 kts, gusting to 20-25 kts. && .TOP WATCHES/WARNINGS/ADVISORIES... None. && DISCUSSION...Teefey AVIATION...Teefey
Hazardous Weather Outlook National Weather Service Topeka KS 320 AM CDT Sat Apr 11 2026 KSZ008>012-020>024-026-034>040-054>056-058-059-120830- Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley- Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris- Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson- 320 AM CDT Sat Apr 11 2026 This Hazardous Weather Outlook is for central Kansas, east central Kansas, north central Kansas and northeast Kansas. .DAY ONE...Today and tonight. Isolated flooding could occur this morning where heavy rain falls in north central and far northern Kansas. There is then a low chance that a few storms develop this afternoon. Severe weather could occur with any storms that develop. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Isolated severe storms are again possible Sunday afternoon, mainly in central Kansas. .SPOTTER MESSAGE Weather spotters are encouraged to relay reports of hail, damaging wind, tornadoes and flooding. && More detailed information can be found at: www.weather.gov/media/top/DssPacket.pdf
The Topeka radar (KTWX), 86 km away, was scanning. The volume nearest the first event began at 12:43 UTC.
3 flash flood, 3 hail, 2 flood. Local standard time, as filed.
Kansas department of transportation is shutting down highway K-187 near 112th road due to flooding.
Thirty people were stranded at a campground and needed to be rescued.
A local county road is closed due to flooding.
Black Vermillion River is out of its banks and threatening the community.
The Nemaha River is out of its banks and 146th street is closed west of highway 63.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kansas in 2026Every state in 2026This day in weather historyWarnings in Kansas, April 2026
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: 1324022, 1324024, 1324025, 1324026, 1324028, 1324029, 1324030, 1324032.