South Dakota

Storm History: Lake County, South Dakota

522 episodes, 664 events since 1956

Every storm the National Weather Service has filed in Lake 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
664
Deaths
2
Injuries
4
Damage
$50 million
Episodes
522

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 Lake 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
Hail16700$2.2 million
Tornado6300$3.0 million
Winter Weather5510
Winter Storm5300
Flash Flood5310$2.6 million
Blizzard4504$3.5 million
High Wind4200$157,000
Drought4100$7.5 million
Thunderstorm Wind4000$920,000
Heavy Snow2200
Extreme Cold/Wind Chill2100
Excessive Heat2000
Cold/Wind Chill1600
Flood1100$30 million
Ice Storm700$110,000
Lightning300$2,000
Heat300
Wildfire100
Strong Wind100

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 Lake County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Lake CountyEvery warning in Lake 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.