Flash Flood — Jefferson, Iowa

2021-06-24 · near Libertyville, Jefferson, Iowa

Event narrative

A deputy reported water on Grasstree Avenue north of 265th Street near the bridge.

Wider weather episode

A line of strong thunderstorms and heavy rain moved through Iowa on the 24th, which led to flash flooding for some areas. The areas seeing the largest impact were in Jefferson and Van Buren Counties in Iowa. The environment in which these storms were in not only favored thunderstorms, but heavy rain, as moisture indices were near record level. Very efficient rain rates were seen, where 2 to 3 inches per hour were common.

View location on OpenStreetMap → (40.9271, -92.0498)

Source: NOAA Storm Events Database, event_id 964112. Narrative written by the NWS forecast office that issued the report.