Hail and Damaging Winds in South Dakota, July 17, 2007

Name: Hail and Damaging Winds in South Dakota, July 17, 2007
Start: 2007-07-17T17:10
End: 2007-07-17T22:15
Location: South Dakota

July 17, 2007 · NWS UNR · 10 events in 2 counties and zones

Severe thunderstorms developed across south central South Dakota during the late afternoon and evening, dropping large hail and producing wind gusts around 80 mph.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 10

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.

What happened

The episode as NWS UNR wrote it up.

Severe thunderstorms developed across south central South Dakota during the late afternoon and evening, dropping large hail and producing wind gusts around 80 mph.

What forecasters said that day

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 Jul 17, 2:10 PM CST, 3 hours earlier.

Area forecast discussion, Jul 17, 2:10 PM CST, 3 hours before

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Hazardous weather outlook, Jul 17, 6:49 AM CST, 10 hours 21 minutes before

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The radar

The North Platte radar (KLNX), 188 km away, was scanning. The volume nearest the first event began at 23:11 UTC.

Open the radar archive at this moment

Event by event

5 thunderstorm wind, 5 hail. Local standard time, as filed.

Thunderstorm Wind, Tripp

When: July 17, 5:10 PM CST
Where: Tripp County, 14 mi NE of Winner
Measured: 70 kt (81 mph) estimated gust
Reported by: Public
Coordinates: 43.513, -99.673

Hail, Tripp

When: July 17, 5:15 PM CST
Where: Tripp County, 10 mi NE of Winner
Measured: 0.75 in hail
Reported by: Public
Coordinates: 43.472, -99.729

Thunderstorm Wind, Tripp

When: July 17, 5:15 PM CST
Where: Tripp County, 10 mi NE of Winner
Measured: 61 kt (70 mph) estimated gust
Reported by: Public
Coordinates: 43.472, -99.729

Hail, Tripp

When: July 17, 5:30 PM CST
Where: Tripp County, 7 mi N of Ideal
Measured: 2.5 in hail
Reported by: Public
Coordinates: 43.631, -99.900

Thunderstorm Wind, Tripp

When: July 17, 5:30 PM CST
Where: Tripp County, 11 mi SSE of Hamill
Measured: 61 kt (70 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 43.433, -99.596

Hail, Tripp

When: July 17, 5:40 PM CST to 6:10 PM CST
Where: Tripp County, 4 mi N of Ideal
Measured: 2 in hail
Reported by: Public
Coordinates: 43.588, -99.900

Large hail lasted for 30 minutes.

Hail, Tripp

When: July 17, 6:30 PM CST to 6:45 PM CST
Where: Tripp County, 2 mi NW of Ideal
Measured: 0.88 in hail
Reported by: Public
Coordinates: 43.550, -99.928

Hail, Todd

When: July 17, 10:15 PM CST
Where: Todd County, 11 mi S of Okreek
Measured: 0.88 in hail
Reported by: Public
Coordinates: 43.211, -100.380

Thunderstorm Wind, Todd

When: July 17, 10:15 PM CST
Where: Todd County, 11 mi S of Okreek
Measured: 52 kt (60 mph) estimated gust
Reported by: Public
Coordinates: 43.211, -100.380

Thunderstorm Wind, Todd

When: July 17, 10:15 PM CST
Where: Todd County, 8 mi SSE of Okreek
Measured: 52 kt (60 mph) estimated gust
Reported by: Public
Coordinates: 43.263, -100.319

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in South Dakota in 2007 Every state in 2007 This day in weather history Warnings in South Dakota, July 2007

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 2026-10-01. Each event’s entry at NCEI: 35400, 35401, 35402, 35403, 35404, 35405, 35406, 35407, 35408, 35409.