FloodZoneMap.org

Flash Flood — Grant, WI

Jun 9, 2018

Two rounds of showers and thunderstorms developed along the Mississippi River and then moved slowly southeast across southwest Wisconsin during the late evening of June 8th into the early morning of the 9th. Runoff from these storms produced some flash flooding that caused a mudslide that covered a portion of County Road A near Bagley and debris and water covered roads near Beetown.

Source: NOAA National Weather Service Storm Events Database (event 759390). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Grant, WI

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

View Grant County flood data →

More Flood Stories

Flash Flood$300K damage

Grant, WI · Aug 10, 2025

Two separate rounds of storms moved through Grant County on August 10th bringing both heavy rain and flash flooding along with them. The first round of storms moved through during the early morning hours bringing widespread flooding issues to northern portions of the county.

Read the full account →
Flash Flood$75K damage

Grant, WI · Aug 17, 2025

Rounds of strong to severe storms throughout the day on August 16th resulted in instances of large hail, damaging winds and flash flooding in western Wisconsin. Hail with these storms reached up to golf ball sized near New Lisbon along with instances of tree damage.

Read the full account →
Flash Flood$25K damage

Grant, WI · Aug 10, 2025

Two separate rounds of storms moved through Grant County on August 10th bringing both heavy rain and flash flooding along with them. The first round of storms moved through during the early morning hours bringing widespread flooding issues to northern portions of the county.

Read the full account →
Flash Flood$900K damage

Grant, WI · Sep 12, 2019

A couple rounds of thunderstorms moved across southwest Wisconsin during the afternoon and evening of September 12th. These storms dropped 3 to 4 inches of rain on the region and with already saturated soils, flash flooding occurred across parts of Grant and Crawford Counties.

Read the full account →