FloodZoneMap.org

Flood — Day, SD

May 11, 1998

Heavy rain of 2 to 4 inches with some amounts nearing 5 inches fell across a large part of the six county area mainly on the evening of the 11th. This round of heavy rain only exacerbated the already extensive flooding occurring from many years of above normal precipitation. Day county was most affected by this round of heavy rain where area lakes were already at new record levels. Blue Dog, Waubay, Rush, and Bitter Lake in Day County were just a few of the lakes hard hit again. In fact, ext

Source: NOAA National Weather Service Storm Events Database (event 5646749). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Day, SD

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

View Day County flood data →

More Flood Stories

Flood$150K damage

Day, SD · Apr 12, 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$104K damage

Day, 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 →
Flood$130K damage

Day, SD · Jul 1, 2005

Heavy rains of three to seven inches fell across far eastern Brown, western and northern Day, and most of Marshall counties in late June causing widespread flooding. The flood waters slowly receded through July 10th.

Read the full account →
Flood

Day, SD · Jun 26, 2025

On June 25th, multiple thunderstorms from the morning into the early afternoon caused flooding in parts of northeast South Dakota. A CoCoRaHS observer 4 miles south-southeast of Milbank recorded 3.33 inches of rain, while the COOP observer in Milbank measured 3.25 inches.

Read the full account →