South Dakota, 2024

Flash Flooding and Hail in South Dakota, August 21 to 22, 2024

August 21 to 22, 2024 · NWS ABR · 11 events in 5 counties and zones

Widespread, slow moving thunderstorms brought hail, gusty wnds and heavy rain to portions of central South Dakota on the afternoon and evening of August 21st. Hail to the size of tennis balls was observed by a trained spotter 4 miles northwest of Murdo.

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

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
$12,000
Events
11

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 ABR wrote it up.

Widespread, slow moving thunderstorms brought hail, gusty wnds and heavy rain to portions of central South Dakota on the afternoon and evening of August 21st. Hail to the size of tennis balls was observed by a trained spotter 4 miles northwest of Murdo. A peak wind speed of 65 mph was observed at a weather station 13 miles north northwest of Sansarc while the ASOS in Pierre peaked at 59 mph. Emergency management and trained spotters estimated about 3.5 inches of rainfall associated with the storms in portions of Jones and Hyde counties which resulted in water over a few roads.

The radar

The Rapid City radar (KUDX), 139 km away, was scanning. The volume nearest the first event began at 01:01 UTC.

Open the radar archive at this moment

Event by event

4 hail, 4 thunderstorm wind, 3 flash flood. Local standard time, as filed.

Hail, Stanley

When
August 21, 6:00 PM MST
Where
Stanley County, 4.18 mi S of Bunker
Measured
1.5 in hail
Reported by
Public
Coordinates
44.170, -101.090

Hail, Jones

When
August 21, 8:00 PM CST
Where
Jones County, 4.26 mi NW of Murdo
Measured
2.5 in hail
Reported by
Trained Spotter
Coordinates
43.930, -100.770

Hail, Jones

When
August 21, 8:00 PM CST
Where
Jones County, 7.66 mi SE of Van Metre
Measured
1 in hail
Reported by
Trained Spotter
Coordinates
44.060, -100.710

Thunderstorm Wind, Hughes

When
August 21, 8:40 PM CST
Where
Hughes County, 0.49 mi E of Harrold Arpt
Measured
56 kt (64 mph) measured gust
Reported by
Mesonet
Coordinates
44.530, -99.720

Thunderstorm Wind, Stanley

When
August 21, 8:00 PM MST
Where
Stanley County, 8.34 mi ENE of Hayes Hamilton Arpt
Measured
56 kt (64 mph) measured gust
Reported by
Mesonet
Coordinates
44.670, -101.140

Flash Flood, Stanley

When
August 21, 8:08 PM MST to August 22, 12:00 AM MST
Where
Stanley County, 1.4 mi NNW of Ft Pierre to 1.92 mi NNW of Ft Pierre
Cause
Heavy Rain
Crop damage
$12,000
Reported by
Trained Spotter
Coordinates
44.369, -100.378

A trained spotter reported 3 to 4 inch deep water over the roadway on highway 14 in Fort Pierre.

Hail, Jones

When
August 21, 9:10 PM CST
Where
Jones County, 5.65 mi SE of Capa
Measured
1.5 in hail
Reported by
Public
Coordinates
44.070, -100.890

Thunderstorm Wind, Hughes

When
August 21, 9:14 PM CST
Where
Hughes County, (Pir)pierre Arpt
Measured
51 kt (59 mph) measured gust
Reported by
ASOS
Coordinates
44.380, -100.280

Thunderstorm Wind, Dewey

When
August 21, 8:20 PM MST
Where
Dewey County, 12.75 mi SSE of Thatcher
Measured
52 kt (60 mph) estimated gust
Reported by
Public
Coordinates
44.860, -100.800

Thunderstorm winds resulted in a power outage that persisted through the early morning the next day.

Flash Flood, Jones

When
August 21, 10:30 PM CST to August 22, 6:00 AM CST
Where
Jones County, 6.68 mi NNE of Draper to 7.61 mi NNE of Draper
Cause
Heavy Rain
Reported by
Trained Spotter
Coordinates
44.009, -100.478

A trained spotter indicated that 3.5 inches of rain overnight had resulted in water over the roads in several places near his property.

Flash Flood, Hyde

When
August 22, 12:00 AM CST to 6:00 AM CST
Where
Hyde County, 12.07 mi SSW of Holabird to 12.76 mi SSW of Holabird
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
44.359, -99.674

The emergency manager indicated that 3.5 inches of rain had fallen overnight resulting in water over some of the roads in this area.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

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

The same day elsewhere

More

Every storm in South Dakota in 2024Every state in 2024This day in weather historyWarnings in South Dakota, August 2024

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 2026-09-30. Each event’s entry at NCEI: 1200836, 1200837, 1200838, 1200840, 1200842, 1200936, 1200839, 1200843, 1200844, 1200939, 1200941.