Flood — Sioux, Iowa

2025-07-30 to 2025-07-31 · near Newkirk, Sioux, Iowa

Event narrative

The Floyd River at Alton rose above flood stage on the evening of July 30th, cresting around 1.46 feet above flood stage (13.46 ft) on July 31st. The river then fell below flood stage on the afternoon of July 31st.

Wider weather episode

A wet period at the end of the July resulted in saturated soils and increased runoff, allowing for isolated river flooding through portions of the Floyd River Basin. The sharpest rises were observed with a heavy rain on the night of July 29 into the morning of July 30.

View location on OpenStreetMap → (43.0700, -95.9600)

Source: NOAA Storm Events Database, event_id 1288695. Narrative written by the NWS forecast office that issued the report.