Flash Flood — Dubuque, Iowa

2025-08-10 · near Peosta, Dubuque, Iowa

Event narrative

Whitewater creek completely out of its banks at Timberline golf course. Low areas of golf course flooded. Most creeks full or overflowing in southern Dubuque county. Swiss Valley Nature Reserve campground flooded and evacuated, due to flooding on Catfish Creek. Reported 6.50 inches of rain just southeast of Peosta, Iowa.

Wider weather episode

Multiple rounds of thunderstorms tracked across the area early Sunday August 10th, bringing very heavy rain, frequent lightning, and some localized gusty winds. Rainfall rates over 2/hr on top of saturated ground caused flash flooding with water over roadways and creeks overflowing. Late afternoon and evening storms brought more heavy rain and three brief tornadoes in Lee county in Iowa and Clark county in Missouri. No damage was reported or seen with these tornadoes.

View location on OpenStreetMap → (42.3900, -90.8800)

Source: NOAA Storm Events Database, event_id 1273417. Narrative written by the NWS forecast office that issued the report.