FloodZoneMap.org

Flood — Grant, SD

May 7, 2024

A wet April and early May, including heavy rain producing thunderstorms on May 6th, resulted in the North Fork Whetstone River briefly rising to above flood stage during the evening of May 7th into the morning of May 8th. The nearby Milbank COOP observer recorded 3.37 inches of rain in April and an additional 1.33 inches of rain during the first week of May. The river peaked at 1056.55 feet, or 0.55 feet above flood stage. These high river levels resulted in inundation of agricultural fields, an

Source: NOAA National Weather Service Storm Events Database (event 1171263). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Grant, SD

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

Flood$150K damage

Grant, SD · Apr 10, 2023

The snowfall during the season in northeast and central South Dakota exceeded normal levels, with many locations ranking among the top 10 for the snowiest seasons.

Read the full account →
Flood$76K damage

Grant, SD · Apr 1, 2019

The continuation of snowmelt from a much above normal snowfall winter combined with a historic heavy snow/blizzard in mid-April resulted in widespread flooding across central and northeast South Dakota.

Read the full account →
Flash Flood$40K damage

Grant, SD · Jul 14, 2013

A line of storms moving across north central South Dakota during the early morning hours on the 14th became heavy rainfall producing thunderstorms for northeastern South Dakota. Rainfall amounts of 2 to 5 inches caused mainly localized flooding.

Read the full account →
Flood$240K damage

Grant, SD · Apr 7, 2001

Heavy rain of 1 to 3 inches combined with snowmelt runoff brought flooding to parts of northeast South Dakota. Many roads across Clark, Grant, Hamlin, Deuel, and Roberts counties were flooded and damaged.

Read the full account →