Flash Flood — Walworth, Wisconsin

2025-06-18 · near Allen Grove, Walworth, Wisconsin

Event narrative

Numerous streets flooded in and around Delavan. A creek flooded in Delavan. Videos and pictures provided.

Wider weather episode

Low pressure tracking from northern Missouri to southern Lake MI spread rounds of thunderstorms across far southern WI. This eventually led to flash flooding in Rock and Walworth Counties after 4-6 inches of rain had fallen.

View location on OpenStreetMap → (42.5610, -88.7660)

Source: NOAA Storm Events Database, event_id 1259112. Narrative written by the NWS forecast office that issued the report.