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Flood — Polk, IA

Jul 1, 2018

Very heavy rain fell across the Des Moines and Waterloo metro areas on the evening of June 30th. This led to flash flooding and river flooding that continued into 01 July 2018. Some of the rivers remained in flood through much of July, and the West Fork of the Des Moines River at Estherville remained in flood through nearly all of July. ||Previous write-up from 30 June 2018|A frontal boundary was draped across areas just west of Iowa during the morning hours of June 30th, and slowly moved eastwa

Source: NOAA National Weather Service Storm Events Database (event 769312). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Polk, IA

This event is one of many recorded floods in Polk County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

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Polk, IA · Aug 11, 2010

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Flash Flood1 death$1.0M damage

Polk, IA · Jun 30, 2018

A frontal boundary was draped across areas just west of Iowa during the morning hours of June 30th, and slowly moved eastward into the state throughout the day.

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Polk, IA · Jul 20, 2025

Diurnally driven afternoon storms on Sunday, July 20th, 2025, developed within an unstable environment with CAPE values over 3000 J/kg and 40 to 45 kts of effective shear.

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