Alert archive / South Dakota / Tornado Warnings in 2000

Tornado Warning 36, NWS Sioux Falls, SD

August 5, 2000Jerauld County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Aug 5, 2000, 12:42 AM CDT for Jerauld County, South Dakota. It was in force for 33 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 5, 2000, 12:42 AM CDT (05:42 UTC)
Expired: Aug 5, 2000, 1:15 AM CDT
In force: 33 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Jerauld County, SD

The radar

The Aberdeen radar (KABR), 155 km from the middle of the area, began a volume at 05:45 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 5, 1:10 AM CDT	Hail 0.75	Alpena, SD	Large hail, driven by strong winds, stripped crops in the Alpena area.
Aug 5, 1:10 AM CDT	Thunderstorm Wind 57 E	Alpena, SD	Thunderstorm winds caused tree damage and blew down power lines.

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 4, 10:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 5.7 hours before the alert went out and 95 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: 2354 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFSD 050544 COR
TORFSD

SDC073-050615-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTED FOR NORTHWEST JERAULD COUNTY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1242 AM CDT SAT AUG 5 2000

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWEST JERAULD COUNTY IN EAST CENTRAL SOUTH DAKOTA

* UNTIL 115 AM CDT

* AT 1242 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 31 MILES WEST OF HURON...MOVING   SOUTHEAST AT 35 MPH.

* THE TORNADO WILL BE REMAIN...
OVER RURAL JERAULD COUNTY THROUGH 115 AM CDT

THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING
SITUATION. IF YOU ARE IN THE PATH OF THIS TORNADO...TAKE COVER
IMMEDIATELY. GO TO THE BASEMENT. IF A BASEMENT IS NOT AVAILABLE...GO
TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 11:29 PM CDT	Severe Thunderstorm Warning	FSD	Brule	31 min
Aug 4, 11:52 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	53 min
Aug 5, 12:46 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	29 min
Aug 5, 1:07 AM CDT	Severe Thunderstorm Warning	FSD	Jerauld, Sanborn	38 min
Aug 5, 1:45 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Sanborn	30 min
Aug 5, 2:03 AM CDT	Severe Thunderstorm Warning	FSD	Hanson	27 min
Aug 5, 2:16 AM CDT	Severe Thunderstorm Warning	FSD	Davison	14 min
Aug 5, 2:30 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson	30 min
Aug 5, 4:41 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	34 min

Nearby

Tornado Warnings in South Dakota, 2000 Every tornado warning in 2000 Tornadoes in 2000

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.