Hail in South Dakota, July 9, 2020

Name: Hail in South Dakota, July 9, 2020
Start: 2020-07-09T03:33
End: 2020-07-09T03:33
Location: South Dakota

July 9, 2020 · NWS UNR · 1 event in 1 county or zone

A thunderstorm briefly became severe north of Philip, producing large hail around golf ball size.

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: 1

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.

A thunderstorm briefly became severe north of Philip, producing large hail around golf ball size.

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 9, 2:15 AM MST, 1 hour 18 minutes earlier.

Area forecast discussion, Jul 9, 2:15 AM MST, 1 hour 18 minutes before

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Hazardous weather outlook, Jul 9, 2:40 AM MST, 53 minutes before

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In the hours before

Special weather statement, Jul 9, 12:27 AM MST, 3 hours 6 minutes before

Special Weather Statement
National Weather Service Rapid City SD
127 AM MDT Thu Jul 9 2020

SDZ030-031-090815-
Custer Co Plains SD-Pennington Co Plains SD-
127 AM MDT Thu Jul 9 2020

...STRONG THUNDERSTORM OVER NORTHEASTERN CUSTER AND SOUTH CENTRAL
PENNINGTON COUNTIES...

At 127 AM MDT, Doppler radar was tracking a strong thunderstorm near
Folsom, or 27 miles southeast of Rapid City, moving east at 25 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
Scenic, Folsom, Sheep Mountain Table and Badlands National Park.

LAT...LON 4374 10292 4385 10292 4385 10259 4381 10241
      4369 10247 4369 10280
TIME...MOT...LOC 0727Z 289DEG 23KT 4381 10282

Rudge

Special weather statement, Jul 9, 1:59 AM MST, 1 hour 34 minutes before

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Special weather statement, Jul 9, 2:01 AM MST, 1 hour 32 minutes before

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Special weather statement, Jul 9, 2:03 AM MST, 1 hour 30 minutes before

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Special weather statement, Jul 9, 2:52 AM MST, 41 minutes before

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Local storm report, Jul 9, 3:28 AM MST, 5 minutes before

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The radar

The Rapid City radar (KUDX), 88 km away, was scanning. The volume nearest the first event began at 10:30 UTC.

Open the radar archive at this moment

Event by event

1 hail. Local standard time, as filed.

Hail, Haakon

When: July 9, 3:33 AM MST
Where: Haakon County, 8.81 mi NNW of Philip
Measured: 2 in hail
Reported by: Public
Coordinates: 44.160, -101.730

What these are

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 2020 Every state in 2020 This day in weather history Warnings in South Dakota, July 2020

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: 907054.