South Dakota

Storm History: Brown County, South Dakota

854 episodes, 1,437 events since 1955

Every storm the National Weather Service has filed in Brown 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
1,437
Deaths
10
Injuries
44
Damage
$54 million
Episodes
854

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 Brown 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
Hail45100$56,000
Tornado370433$4.3 million
Flood17000$44 million
Thunderstorm Wind7900$500
Flash Flood7900$5.0 million
Blizzard5016
High Wind4900
Extreme Cold/Wind Chill4410
Heavy Snow3800
Drought3000
Winter Storm2814
Wildfire1100$35,000
Excessive Heat1100
Winter Weather700
Ice Storm600
Cold/Wind Chill620
Heat200
Funnel Cloud200
Lightning100$2,000
Dust Storm100
Dense Fog111
Dense Smoke100

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 Brown County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Brown CountyEvery warning in Brown 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.