Thunderstorm Wind in Sully County, South Dakota

Thunderstorm Wind in Sully County, South Dakota: 97 recorded events between 1956 and 2026. The strongest on record measured 108. That places the county #2,253 nationally and #57 statewide for this hazard.

Reporting practice changed over time — early decades are undercounted, not calmer.

The busiest decade for thunderstorm wind in Sully County is the 2000s, when 34 of the county's 97 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.

Within the Sully County archive, thunderstorm wind makes up 34.9% of all recorded severe weather across 6 hazard types. Nationally the county sits at #2,253 for this hazard and #57 within South Dakota, putting it in the 28.8 percentile of all U.S. counties.

Aug is the peak month for thunderstorm wind in Sully County with 28 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.

• Hail 146

Written by National Weather Service staff at the time of the event · public domain

How many thunderstorm wind events are on record in Sully County, South Dakota?

97 thunderstorm wind events are recorded in Sully County between 1956 and 2026, causing 0 direct deaths.

What is the strongest thunderstorm wind recorded in Sully County?

The strongest thunderstorm wind on record in Sully County measured 108.

Where does the thunderstorm wind data for Sully County come from?

All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.