Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 231, NWS Sioux Falls, SD

August 3, 2002Brookings County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 3, 2002, 5:15 PM CDT for Brookings County, South Dakota. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 3, 2002, 5:15 PM CDT (22:15 UTC)
Expired: Aug 3, 2002, 6:00 PM CDT
In force: 45 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Brookings County, SD

The radar

The Sioux Falls radar (KFSD), 93 km from the middle of the area, began a volume at 22:18 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 3, 5:30 PM CDT	Thunderstorm Wind 57 E	White, SD	Thunderstorm winds tipped over farm equipment.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 3, 3:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.3 hours before the alert went out and 134 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 908 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 322 m²/s²
0-3 km storm-relative helicity: 548 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

046 
WUUS53 KFSD 032215
SVRFSD
SDC011-032300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
515 PM CDT SAT AUG 3 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA

* UNTIL 600 PM CDT

* AT 515 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTHWEST OF VOLGA...OR ABOUT 12 MILES
  NORTHWEST OF BROOKINGS...MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRUCE...BROOKINGS AROUND 520 PM CDT
  AURORA AROUND 525 PM CDT
  WHITE AROUND 530 PM CDT

THIS STORM WILL PRODUCE LARGE HAIL AND DAMAGING WIND. GO INSIDE A
STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4451 9710 4427 9708 4424 9650 4456 9647

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 3, 3:41 PM CDT	Severe Thunderstorm Warning	FSD	Brule	34 min
Aug 3, 4:01 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	44 min
Aug 3, 4:13 PM CDT	Severe Thunderstorm Warning	FSD	Miner	32 min
Aug 3, 4:26 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Sanborn	44 min
Aug 3, 4:42 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury	33 min
Aug 3, 4:42 PM CDT	Severe Thunderstorm Warning	FSD	Moody	48 min
Aug 3, 4:45 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	30 min
Aug 3, 5:12 PM CDT	Severe Thunderstorm Warning	FSD	Lake	38 min
Aug 3, 5:32 PM CDT	Severe Thunderstorm Warning	FSD	Hanson	43 min
Aug 3, 5:46 PM CDT	Severe Thunderstorm Warning	FSD	Moody	44 min
Aug 3, 6:37 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha	28 min
Aug 3, 6:47 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Turner	38 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.