Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 239, NWS Sioux Falls, SD

August 3, 2002Lincoln County, Turner County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 3, 2002, 6:47 PM CDT for Lincoln County, Turner County, South Dakota. It was in force for 38 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, 6:47 PM CDT (23:47 UTC)
Expired: Aug 3, 2002, 7:25 PM CDT
In force: 38 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

Counties Lincoln County, SD, Turner County, SD

The radar

The Sioux Falls radar (KFSD), 25 km from the middle of the area, began a volume at 23:46 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, 7:00 PM CDT	Thunderstorm Wind 52 E	Harrisburg, SD	Thunderstorm winds caused tree damage, including several branches blown down.

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, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.8 hours before the alert went out and 211 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.

187 
WUUS53 KFSD 032347
SVRFSD
SDC083-125-040025-

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LINCOLN COUNTY IN SOUTHEAST SOUTH DAKOTA
  EASTERN TURNER COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 725 PM CDT

* AT 647 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 10 MILES NORTH OF HARRISBURG TO 3
  MILES NORTHWEST OF HURLEY...OR FROM 4 MILES NORTHEAST OF SIOUX
  FALLS TO 6 MILES SOUTH OF PARKER...MOVING EAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  LENNOX AROUND 655 PM CDT
  HARRISBURG...DAVIS AROUND 700 PM CDT
  WORTHING AROUND 705 PM CDT

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WIND. GO INSIDE A
STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4351 9673 4328 9736 4323 9683 4334 9653

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, 5:15 PM CDT	Severe Thunderstorm Warning	FSD	Brookings	45 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

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.