Alert archive / South Dakota / Tornado Warnings in 2002

Tornado Warning 9, NWS Aberdeen, SD

July 24, 2002Lyman County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 24, 2002, 8:07 PM CDT for Lyman County, South Dakota. It was in force for 38 min. 4 reports 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: Jul 24, 2002, 8:07 PM CDT (01:07 UTC)
Expired: Jul 24, 2002, 8:45 PM CDT
In force: 38 min
Issued by: NWS Aberdeen, SD
Area: Counties, with a storm outline in the text

County Lyman County, SD

The radar

The Aberdeen radar (KABR), 192 km from the middle of the area, began a volume at 01:09 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
Jul 24, 8:14 PM CDT	Tornado F0	Presho, SD	A tornado touched down briefly north of Presho and caused no damage. Path length and width were estimated.
Jul 24, 8:15 PM CDT	Hail 1.75	Kennebec, SD
Jul 24, 8:15 PM CDT	Thunderstorm Wind 52 E	Kennebec, SD
Jul 24, 8:35 PM CDT	Hail 1	Reliance, SD

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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.1 hours before the alert went out and 148 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: 2473 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1734 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 191 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 14.5

Open this sounding in Storm Lab

The text

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

259 
WFUS53 KABR 250107
TORABR
SDC085-250145-
/NEW.KABR.TO.W.0020.250107-250145/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
807 PM CDT WED JUL 24 2002

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  LYMAN COUNTY IN CENTRAL SOUTH DAKOTA

* UNTIL 845 PM CDT

* AT 807 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES WEST OF
  CEDAR CREEK REC AREA...OR ABOUT 16 MILES NORTH OF PRESHO...MOVING
  SOUTHEAST AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  LYMAN AROUND 840 PM CDT
  RELIANCE AROUND 845 PM CDT

THIS IS AN EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING
SITUATION. IF YOU ARE IN THE PATH OF THIS TORNADO TAKE SHELTER NOW

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
ABERDEEN.

LAT...LON 4421 10000 4410 10020 4380 9966 4398 9948
          4412 9984

MOHR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 7:16 PM CDT	Severe Thunderstorm Warning	ABR	Hughes, Sully	44 min
Jul 24, 7:37 PM CDT	Severe Thunderstorm Warning	ABR	Stanley	23 min
Jul 24, 7:50 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	40 min
Jul 24, 8:52 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	23 min
Jul 24, 10:04 PM CDT	Severe Thunderstorm Warning	ABR	Corson	41 min
Jul 24, 10:42 PM CDT	Severe Thunderstorm Warning	ABR	Campbell	48 min
Jul 24, 10:50 PM CDT	Severe Thunderstorm Warning	ABR	Walworth	25 min
Jul 24, 11:51 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds	39 min
Jul 25, 12:13 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Clark, Day, Faulk, Marshall, Spink	62 min
Jul 25, 1:01 AM CDT	Severe Thunderstorm Warning	ABR	Grant, Roberts	44 min

Nearby

Tornado Warnings in South Dakota, 2002 Every tornado warning in 2002 Tornadoes 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.