FloodZoneMap.org

Flood — Hamlin, SD

Apr 1, 2019

Above normal snowmelt runoff from the winter along with snowmelt from a mid-April blizzard caused near historic rises on Lake Poinsett in southern Hamlin county. Lake Poinsett rose to 1,657.1 feet on April 27th which was just below the record of 1657.6 feet. The high lake levels combined with periodic strong winds and early ice breakup brought extensive damage to homes and outbuildings along the lake. The strong winds brought 3 to 4 foot waves crashing into and damaging structures. Some outbuild

Source: NOAA National Weather Service Storm Events Database (event 821089). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Hamlin, SD

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

View Hamlin County flood data →

More Flood Stories

Flood$202K damage

Hamlin, 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$800K damage

Hamlin, SD · Apr 1, 2011

Snowmelt flooding in March continued across much of central and northeast South Dakota as the rest of the snowpack melted into early April. Many roads along with countless acres of crop and pastureland remained flooded.

Read the full account →
Flood$191K damage

Hamlin, 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 →
Flood

Hamlin, SD · Jul 27, 2025

An afternoon thunderstorm developed near the town of Henry and very quickly spun up a violent tornado. This tornado would cause significant damage to a farmstead before dissipating.

Read the full account →