Hail, Harding
- When
- June 4, 2:06 PM MST to 2:11 PM MST
- Where
- Harding County, 4 mi SSW of Reva
- Measured
- 0.88 in hail
- Reported by
- Trained Spotter
- Coordinates
- 45.496, -103.112
The ground was covered with hail.
A long-lived supercell thunderstorm developed over Harding County and tracked east-southeast across northwestern South Dakota. The storm produced hail to baseball size across parts of the area, with wind gusts around 60 mph as well.
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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 UNR wrote it up.
A long-lived supercell thunderstorm developed over Harding County and tracked east-southeast across northwestern South Dakota. The storm produced hail to baseball size across parts of the area, with wind gusts around 60 mph as well.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Rapid City, SD wrote its last area forecast discussion before the first event at Jun 3, 4:21 PM MST, 21 hours 45 minutes earlier.
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</html>The Rapid City radar (KUDX), 154 km away, was scanning. The volume nearest the first event began at 21:04 UTC.
10 hail, 1 thunderstorm wind. Local standard time, as filed.
The ground was covered with hail.
The ground was covered with hail.
Wind gusts were estimated at 60 mph.
Wind gusts reached 40 mph.
Wind gusts were estimated at 50 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2020Every state in 2020This day in weather historyWarnings in South Dakota, June 2020
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 2026-10-01. Each event’s entry at NCEI: 891571, 891572, 891573, 891574, 891576, 891577, 891581, 891580, 891575, 891583, 891584.