Thunderstorm Wind, Douglas
- When
- June 20, 4:00 AM CST to 4:10 AM CST
- Where
- Douglas County, Armour
- Measured
- 70 kt (81 mph)
- Property damage
- $1.0 million
- Coordinates
- 43.320, -98.350
Thunderstorm winds caused widespread damage in and near Armour. The roof was blown off of the high school and the school sustained additional damage.
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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.
The episode as NWS FSD wrote it up.
Thunderstorm winds caused widespread damage in and near Armour. The roof was blown off of the high school and the school sustained additional damage. A house sustained heavy damage when the roof of the school landed on it. Numerous other structures including many homes suffered damage. There was widespread damage to trees and power lines, and much of the damage to structures was caused by tree debris.
The Sioux Falls radar (KFSD), 134 km away, was scanning. The volume nearest the first event began at 09:58 UTC.
1 thunderstorm wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 1997Every state in 1997This day in weather historyWarnings in South Dakota, June 1997
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. Each event’s entry at NCEI: 5602279.