Flash Flood in Riley County, Kansas
Flash Flood May 18, 2026 · Riley County, Kansas
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Social media video of water 8 inches deep over road on campus.
The wider storm
Supercell thunderstorms developed ahead of a dryline and near a warm front during the afternoon and evening hours of May 18. The storms produced 7 documented tornadoes and eventually evolved into a line of storms that produced damaging winds of 60-80 mph across northeast and east central Kansas. Some areas also received 2-5 inches of rain just two to three hours causing flash flooding in several areas including the city of Manhattan.
Began near Manhattan (39.1900, -96.5800).
Other tornadoes from the same storm system
7 more tornadoes the National Weather Service filed under this storm episode.
Source: NOAA Storm Events Database, event 1336804. Narratives are written by the National Weather Service forecast office that issued the report.
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