Hail in South Dakota, July 30, 2023

Name: Hail in South Dakota, July 30, 2023
Start: 2023-07-30T12:39
End: 2023-07-30T13:24
Location: South Dakota

July 30, 2023 · NWS UNR · 12 events in 1 county or zone

A supercell thunderstorm developed over the central Black Hills, producing very large hail larger than baseballs from Pactola Reservoir to Sheridan Lake and eastward to the Rockerville area.

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: 12

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 supercell thunderstorm developed over the central Black Hills, producing very large hail larger than baseballs from Pactola Reservoir to Sheridan Lake and eastward to the Rockerville area.

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 30, 10:27 AM MST, 2 hours 12 minutes earlier.

Area forecast discussion, Jul 30, 10:27 AM MST, 2 hours 12 minutes before

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Hazardous weather outlook, Jul 30, 9:47 AM MST, 2 hours 52 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Rapid City SD
1047 AM MDT Sun Jul 30 2023

SDZ001-002-014-032-043-044-046-047-049-311300-
Harding-Perkins-Ziebach-Haakon-Jackson-Bennett-Mellette-Todd-
Tripp-
1047 AM MDT Sun Jul 30 2023 /1147 AM CDT Sun Jul 30 2023/

This Hazardous Weather Outlook is for portions of western South
Dakota.

.DAY ONE...Today and Tonight

There is a slight risk (level 2 of 5) of severe thunderstorms
late this afternoon and evening, meaning that scattered severe
storms are possible. Primary hazards include large hail and
damaging winds. Storms are expected to develop later this
afternoon and evening and possibly linger overnight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There is a daily chance of thunderstorms through the first half
of the week. Some storms may be strong or severe on Monday, with
hail and strong winds the main threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

SDZ012-013-024>031-041-042-072>074-WYZ054>058-071-311300-
Butte-Northern Meade Co Plains-Northern Black Hills-
Northern Foot Hills-Rapid City-Southern Foot Hills-
Central Black Hills-Southern Black Hills-Custer Co Plains-
Pennington Co Plains-Fall River-Oglala Lakota-
Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Hermosa Foot Hills-Northern Campbell-Southern Campbell-
Western Crook-Wyoming Black Hills-Weston-Northeastern Crook-
1047 AM MDT Sun Jul 30 2023

This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.

.DAY ONE...Today and Tonight

There is an enhanced risk (level 3 of 5) of severe thunderstorms
today, meaning that numerous severe storms are possible. Primary
hazards include very large hail (greater than 2 inches) and
damaging winds. Storms are expected to develop this afternoon and
evening.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There is a daily chance of thunderstorms through the first half
of the week. Some storms may be strong or severe on Monday, with
hail and strong winds the main threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

In the hours before

Local storm report, Jul 30, 9:37 AM MST, 3 hours 2 minutes before

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The radar

The Rapid City radar (KUDX), 59 km away, was scanning. The volume nearest the first event began at 19:39 UTC.

Open the radar archive at this moment

Event by event

12 hail. Local standard time, as filed.

Hail, Pennington

When: July 30, 12:39 PM MST
Where: Pennington County, 4 mi N of Silver City
Measured: 1 in hail
Reported by: Trained Spotter
Coordinates: 44.138, -103.570

Hail, Pennington

When: July 30, 12:48 PM MST
Where: Pennington County, 2 mi NE of Silver City
Measured: 1.75 in hail
Reported by: Trained Spotter
Coordinates: 44.100, -103.541

Hail, Pennington

When: July 30, 12:54 PM MST
Where: Pennington County, 1 mi ENE of Pactola Reservoir
Measured: 2 in hail
Reported by: Trained Spotter
Coordinates: 44.075, -103.461

Hail, Pennington

When: July 30, 12:54 PM MST
Where: Pennington County, 1 mi ESE of Silver City
Measured: 2.75 in hail
Reported by: Public
Coordinates: 44.075, -103.551

Hail, Pennington

When: July 30, 12:55 PM MST
Where: Pennington County, Johnson Siding
Measured: 1.5 in hail
Reported by: Public
Coordinates: 44.080, -103.430

Hail, Pennington

When: July 30, 1:00 PM MST
Where: Pennington County, 1 mi SSE of Pactola Reservoir
Measured: 3 in hail
Reported by: Public
Coordinates: 44.057, -103.472

Hail, Pennington

When: July 30, 1:01 PM MST to 1:16 PM MST
Where: Pennington County, 3 mi N of Sheridan Lake
Measured: 2.5 in hail
Reported by: NWS Employee
Coordinates: 44.023, -103.480

Several roofs were damaged and vehicle windshields were broken by tennis ball sized hail.

Hail, Pennington

When: July 30, 1:02 PM MST
Where: Pennington County, 2 mi S of Pactola Reservoir
Measured: 2.5 in hail
Reported by: NWS Employee
Coordinates: 44.041, -103.480

Hail, Pennington

When: July 30, 1:10 PM MST
Where: Pennington County, 1 mi NNW of Sheridan Lake
Measured: 2.5 in hail
Reported by: Trained Spotter
Coordinates: 43.993, -103.488

Hail, Pennington

When: July 30, 1:14 PM MST
Where: Pennington County, 1 mi SSE of Sheridan Lake
Measured: 3 in hail
Reported by: Public
Coordinates: 43.967, -103.472

Hail, Pennington

When: July 30, 1:16 PM MST
Where: Pennington County, 2 mi E of Sheridan Lake
Measured: 3.25 in hail
Reported by: Public
Coordinates: 43.980, -103.440

Hail, Pennington

When: July 30, 1:24 PM MST
Where: Pennington County, 1 mi SW of Rockerville
Measured: 1 in hail
Reported by: Public
Coordinates: 43.950, -103.374

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 2023 Every state in 2023 This day in weather history Warnings in South Dakota, July 2023

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: 1114649, 1114651, 1114653, 1114654, 1114655, 1114656, 1114658, 1114660, 1114661, 1114663, 1114666, 1114667.