Flash Flood — Winneshiek, Iowa

2025-08-18 · near Calmar, Winneshiek, Iowa

Event narrative

Emergency management reported basements flooded in Calmar.

Wider weather episode

Repeated rounds of rain led to increased saturation in soils during the month of August. As a result, when additional training storms moved over northeast Iowa during the morning hours on August 18th, numerous roads were flooded in Chickasaw and Winneshiek counties.

View location on OpenStreetMap → (43.1800, -91.8600)

Source: NOAA Storm Events Database, event_id 1289339. Narrative written by the NWS forecast office that issued the report.