Damaging Winds in South Dakota, July 30, 2001

Name: Damaging Winds in South Dakota, July 30, 2001
Start: 2001-07-30T21:30
End: 2001-07-30T23:20
Location: South Dakota

July 30, 2001 · NWS ABR · 8 events in 5 counties and zones

8 thunderstorm wind, as filed by the National Weather Service.

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: 8

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 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 Aberdeen, SD wrote its last area forecast discussion before the first event at Jul 30, 7:45 PM CST, 1 hour 45 minutes earlier.

Area forecast discussion, Jul 30, 7:45 PM CST, 1 hour 45 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTHCENTRAL AND NORTHEAST
SOUTH DAKOTA AND WEST CENTRAL MINNESOTA
NATIONAL WEATHER SERVICE ABERDEEN SD
845 PM CDT MON JUL 30 2001

MAIN SFC BOUNDARY STILL REMAINS ON A KJMS-KPIR-KCDR LINE THIS
EVENING. TSRA HAVE FIRED IN FAR SWRN SD NEAR TRIPLE POINT REGION.
CONCERN IS HOW FAR NE WILL THIS CONVECTION PUSH? 00Z KABR SOUNDING
WAS 14.2 C @ 7H...WITH VERY STEEP LAPSE RATE ABOVE CAP LAYER. 18Z
AVN SOUNDING BEST REPRESENTED 00Z SOUNDING...AND SEEMS TO CORRELATE
WELL WITH REALITY. LEFT POPS IN FOR ALL CWA OVERNIGHT AS LEFT OVER
CONVECTION FROM TSRA IN SWRN SD COULD DRIFT OVER DURING THE
OVERNIGHT HOURS. AFTER SEEING THE LOW CLOUDS THIS MORNING...BRIEFLY
TOYED WITH THE IDEA OF ADDING SOME FOG TO THE ERN ZONES.
HOWEVER...MODELS ALL SHOW WINDS STAYING UP OVERNIGHT SO THE LOWER
LAYERS SHOULD REMAIN WELL MIXED KEEPING FOG AT BAY...AS WELL AS
OVERNIGHT LOWS UP. EXCEPT FOR ADDING WATCH BOX EARLIER...NO OTHER
TWEAKS MADE TO ZONE PACKAGE.

.ABR...SVR TSRA WATCH 643 FOR CORSON...DEWEY...STANLEY AND JONES
       COUNTIES UNTIL 0600 UTC.

HINTZ

The radar

The Rapid City radar (KUDX), 175 km away, was scanning. The volume nearest the first event began at 03:31 UTC.

Open the radar archive at this moment

Event by event

8 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Stanley

When: July 30, 9:30 PM CST
Where: Stanley County, Mission Ridge
Measured: 52 kt (60 mph)
Reported by: TRAINED SPOTTER
Coordinates: 44.683, -100.767

Sixty mph winds brought down many large tree branches.

Thunderstorm Wind, Dewey

When: July 30, 10:30 PM CST
Where: Dewey County, 4 mi NW of Lantry
Measured: 55 kt (63 mph)
Reported by: AWOS,ASOS,MESONET,ETC
Coordinates: 45.050, -101.483

Thunderstorm Wind, Dewey

When: July 30, 10:30 PM CST
Where: Dewey County, Glencross
Measured: 56 kt (64 mph)
Reported by: TRAINED SPOTTER
Coordinates: 45.450, -100.933

Large branches were downed by the very strong winds.

Thunderstorm Wind, Corson

When: July 30, 10:40 PM CST
Where: Corson County, 8 mi S of Wakpala
Measured: 61 kt (70 mph)
Reported by: TRAINED SPOTTER
Coordinates: 45.550, -100.533

Thunderstorm Wind, Walworth

When: July 30, 10:48 PM CST
Where: Walworth County, Mobridge
Measured: 58 kt (67 mph)
Reported by: AWOS,ASOS,MESONET,ETC
Coordinates: 45.533, -100.433

Thunderstorm Wind, Walworth

When: July 30, 10:50 PM CST
Where: Walworth County, Mobridge
Measured: 70 kt (81 mph)
Reported by: AWOS,ASOS,MESONET,ETC
Coordinates: 45.533, -100.433

High winds of 81 mph blew much of the roof off of the bowling alley in Mobridge and took the roof off of a steel building which hit a house and damaged it. A trailer home was also damaged by some flying debris. Many trees were snapped in two or uprooted and many power lines were downed.

Thunderstorm Wind, Campbell

When: July 30, 11:10 PM CST
Where: Campbell County, Pollock
Measured: 52 kt (60 mph)
Reported by: TRAINED SPOTTER
Coordinates: 45.900, -100.283

High winds brought down tree branches and also knocked the power out for several hours in Pollock.

Thunderstorm Wind, Campbell

When: July 30, 11:20 PM CST
Where: Campbell County, 1 mi N of Pollock
Measured: 61 kt (70 mph)
Reported by: TRAINED SPOTTER
Coordinates: 45.917, -100.283

Very strong winds blew down many tree branches and also bent some signs over.

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.

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

The same day elsewhere

Every storm in South Dakota in 2001 Every state in 2001 This day in weather history Warnings in South Dakota, July 2001

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 2026-09-24. Each event’s entry at NCEI: 5261637, 5261636, 5261639, 5261638, 5261640, 5261641, 5261642, 5261643.