South Dakota, 2001

Damaging Wind in South Dakota, July 31, 2001

July 31, 2001 · NWS FSD · 1 event in 1 county or zone

1 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
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 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 Sioux Falls, SD wrote its last area forecast discussion before the first event at Jul 31, 7:45 PM CST, 1 hour 25 minutes earlier.

Area forecast discussion, Jul 31, 7:45 PM CST, 1 hour 25 minutes before
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
845 PM CDT TUE JUL 31 2001

NMRS TS HAS FIRED AHD OF SFC PRE-FRONTAL TROF LINE IN CNTRL NEB.
COUPLE OF THINGS GOING ON WITH THIS IN EXPLAINING WHY THESE CELLS
ARE HAVING A HARD TIME SUSTAINING ONCE THEY CROSS THE BRDR INTO SD.
LOOKING AT THE NEW 00Z RUC40...THE JET STAYS PRETTY MUCH QS TNGT NW
OF THE RGN...LEAVING CNTRL NEB IN THIS BEST RIGHT REAR QUAD ENTRANCE
AREA. SINCE THE JET DOESN'T MOVE...SD REALLY NEVER GETS IN THIS AREA
MUCH AT ALL TNGT. IN ADDN...THE NEAR SFC WINDS HAD MUCH BETTER SPEED
CONVERGENCE IN CNTRL NEB...WANING AS IT MOVES NWD. THE FACT THAT THE
WIND SHIFT LINE HAS PROGRESSED INTO CNTRL SD GIVING DIRECTIONAL
CONVERGENCE IS ATLEAST KEEPING SOME OF THIS TS SUSTAINED. BUT IT WL
HAVE A HARD TIME MOVG MUCH FURTHER EWD TNGT DUE TO THE ANEMIC PACE
OF THE SFC BNDRY'S EWD PROGRESS. IN FACT...THE NEW RUC40 SHOWS THE
SFC BNDRY STILL JUST WEST OF A KBKX TO KYKN LINE AT 12Z WED.

ALREADY UPDATED THE ZONES EARLIER TO TAKE OUT THE HEAT ADV THIS
EVENING...AND TO FINE TUNE THE WIND SHIFT LINE WHICH IS MUCH SLOWER
THAN EARLIER ANTICIPATED. THEREFORE HAD TO TWEEK SOME LOWS ALSO WITH
THE SRLY FLOW OVR MUCH OF THE CWA CONITNUING. IT IS INTERESTING TO
SEE WWRD MOVG OUTFLOW BNDRYS ON THE KLNX 88D...WHICH KIND OF TELLS
THE STORY ON HOW FAST THE LOW LVL FRONT IS MOVG.

.FSD...NONEE
 FUHS

The radar

The Sioux Falls radar (KFSD), 124 km away, was scanning. The volume nearest the first event began at 03:12 UTC.

Open the radar archive at this moment

Event by event

1 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Bon Homme

When
July 31, 9:10 PM CST
Where
Bon Homme County, Springfield
Measured
52 kt (60 mph)
Reported by
LAW ENFORCEMENT
Coordinates
42.850, -97.883

Thunderstorm winds caused tree damage. The amount of damage was not known.

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

More

Every storm in South Dakota in 2001Every state in 2001This day in weather historyWarnings 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 2026-10-01. Each event’s entry at NCEI: 5259834.