South Dakota

Storm History: Grant County, South Dakota

457 episodes, 566 events since 1955

Every storm the National Weather Service has filed in Grant County, South Dakota: floods, hail, damaging wind, tornadoes, winter storms, heat and the rest, with the most serious on record. Events filed by forecast zone count for every county the zone covers.

The record

Events
566
Deaths
3
Injuries
4
Damage
$14 million
Episodes
457

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

Open the live radar over Grant County

Every year

From 1996 the record holds 48 kinds of event with each office’s narrative; before that, tornadoes, hail and thunderstorm wind only, and before 1955 tornadoes alone.

By kind of event

Counted under the kind that heads each episode.

Kind of eventEventsDeathsInjuriesDamage
Hail12302$610,000
Tornado7400$462,000
Blizzard7000
Flash Flood4400$410,000
Extreme Cold/Wind Chill4210
Heavy Snow4100
High Wind4000
Winter Storm3511
Flood2810$10 million
Drought1600
Thunderstorm Wind1500
Ice Storm900$1.8 million
Excessive Heat800
Winter Weather801
Cold/Wind Chill400
Lightning300$2,000
Wildfire200
Dense Fog100
Heat100
Lakeshore Flood100
Freezing Fog100

The deadliest

The costliest

Damage within this county, in the dollars of its year.

The largest hail

The largest stone in each episode, which may have fallen in a neighboring county of the same episode.

The strongest tornadoes

Every tornado in Grant County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Grant CountyEvery warning in Grant County since 1986Every county in South Dakota

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.