FloodZoneMap.org

Flash Flood — Calhoun, IA

Aug 2, 2001

A nearly stationary front extended west-southwest to east-northeast across Iowa. Thunderstorms fired repeatedly along this front during the night of the 1st into the morning of the 2nd. The first round of thunderstorms left around three inches of rain in the area as they passed. With conditions prior to the rain being relatively dry, flooding from this round was limited to urban and a few low lying areas. Another round of thunderstorms moved into the area during the morning on the 2nd, leavi

Source: NOAA National Weather Service Storm Events Database (event 5260970). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Calhoun, IA

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

View Calhoun County flood data →

More Flood Stories

Flash Flood$250K damage

Calhoun, IA · May 1, 2001

Warm and moist air streamed into Iowa on 20 to 35 MPH surface winds from the south. By the late afternoon, temperatures over the southwest half of the state warmed into the mid 80s to around 90 with surface dew point temperatures in the low 60s.

Read the full account →
Flash Flood$50K damage

Calhoun, IA · Jun 20, 2018

Without even looking at supporting variables, the setup for impactful weather could be gleaned from the general setup. A weak surface pressure system was slowly working its way across Iowa, situating its relevant boundaries primarily across southwest and southern Iowa.

Read the full account →
Flash Flood$15K damage

Calhoun, IA · Sep 15, 2016

Storms initiated out in the Nebraska Panhandle area the night prior, translating eastward through the night across northern Nebraska and southern South Dakota.

Read the full account →
Flood$20K damage

Calhoun, IA · Dec 14, 2015

Heavy rain that fell across the state in mid-December led to river flooding at many locations across central and southern Iowa. The ground was already saturated from a wet fall, with new rainfall of one to 3 inches fell across the area in a two-day span.

Read the full account →