Flash Flood Warning, Flood Advisories Issued for Kansas City Region
Thunderstorms pounded the Kansas City region overnight, prompting a Flash Flood Warning for the metro area and two Flood Advisories covering dozens of communities in Kansas and Missouri.
KANSAS CITY, MISSOURI — The National Weather Service office in Pleasant Hill issued a Flash Flood Warning and two separate Flood Advisories early Sunday morning for numerous communities across northeastern Kansas and northwestern Missouri, as thunderstorms brought heavy rainfall to the region in the pre-dawn hours of June 21, 2026.
Flash Flood Warning in Effect Through 8:30 AM
The Flash Flood Warning was issued at 4:42 AM CDT and remains in effect until 8:30 AM CDT. It covers Johnson County, Leavenworth County, and Wyandotte County in northeastern Kansas, as well as Southwestern Clay County and Southeastern Platte County in west central Missouri.
According to the National Weather Service, Doppler radar confirmed thunderstorms were producing heavy rain across the warned area as of 4:42 AM, with between 1 and 2.5 inches of rain already on the ground. An additional 0.5 to 2 inches of rainfall is possible before the warning expires.
Flash flooding threatens small creeks and streams, urban roadways, highways, underpasses, and other low-lying or poor-drainage areas throughout the zone. Communities expected to experience flash flooding include Kansas City, Overland Park, Olathe, Shawnee, Lenexa, and Leavenworth.
Two Flood Advisories Cover Broader Tri-State Area
A Flood Advisory issued at 4:48 AM CDT covers Doniphan County in northeastern Kansas along with West Central Andrew County and Southeastern Holt County in northwestern Missouri, and is in effect until 7:00 AM CDT. The National Weather Service reported that between 1.5 and 3 inches of rain had already fallen in that zone by the time the advisory was issued.
Communities in that advisory area include Highland, Troy, Oregon, Forest City, White Cloud, Denton, Doniphan, Severance, Leona, Fanning, Bendena, and Iowa Point. Minor flooding in low-lying and poor drainage areas is ongoing or expected to begin shortly, according to the NWS.
A second Flood Advisory, issued at 4:47 AM CDT and active until 8:00 AM CDT, covers a broader stretch of north central and northwestern Missouri, including Northwestern Caldwell County, Southwestern Daviess County, East Central Andrew County, Southeastern Buchanan County, Clinton County, and DeKalb County.
That advisory area had received between 0.5 and 1.5 inches of rain as of the issuance time, with an additional 0.5 to 2 inches expected. Affected communities include Cameron, Plattsburg, Lathrop, Gower, Maysville, Stewartsville, Union Star, Osborn, Clarksdale, Kidder, and Winston.
Residents Urged to Avoid Flooded Areas
All three alerts were issued by the NWS Kansas City/Pleasant Hill office and cite excessive rainfall from overnight thunderstorm activity as the cause of the flooding. The advisories warn of minor flooding in low-lying areas, while the Flash Flood Warning signals more dangerous and rapidly developing conditions in the Kansas City metropolitan area.
The National Weather Service advises residents to avoid flooded roadways and low-lying areas during active flood alerts. Additional flood safety information is available at weather.gov/safety/flood.
