Alert archive / South Dakota / Tornado Warnings in 2002

Tornado Warning 12, NWS Aberdeen, SD

August 11, 2002Hyde County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Aug 11, 2002, 6:54 PM CDT for Hyde County, South Dakota. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 11, 2002, 6:54 PM CDT (23:54 UTC)
Expired: Aug 11, 2002, 7:30 PM CDT
In force: 36 min
Issued by: NWS Aberdeen, SD
Area: Counties, with a storm outline in the text

County Hyde County, SD

The radar

The Aberdeen radar (KABR), 140 km from the middle of the area, began a volume at 23:57 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.

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 11, 1:55 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.9 hours before the alert went out and 103 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: 61 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 2395 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

513 
WFUS53 KABR 112354
TORABR
SDC069-120030-
/NEW.KABR.TO.W.0023.112354-120030/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
654 PM CDT SUN AUG 11 2002

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

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

* UNTIL 730 PM CDT

* AT 654 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES WEST OF
  HOLABIRD...OR ABOUT 15 MILES WEST OF HIGHMORE...MOVING EAST AT 25
  MPH.

* THE TORNADO WILL BE NEAR...
  HOLABIRD AROUND 705 PM CDT
  HIGHMORE AROUND 720 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 4454 9968 4442 9966 4440 9942 4460 9941

PARKIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 3:13 PM CDT	Severe Thunderstorm Warning	ABR	Corson	62 min
Aug 11, 3:17 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	43 min
Aug 11, 4:01 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	59 min
Aug 11, 5:01 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	44 min
Aug 11, 5:22 PM CDT	Severe Thunderstorm Warning	ABR	Stanley, Sully	53 min
Aug 11, 5:48 PM CDT	Severe Thunderstorm Warning	ABR	Hughes	57 min
Aug 11, 6:14 PM CDT	Severe Thunderstorm Warning	ABR	Sully	46 min
Aug 11, 6:32 PM CDT	Tornado Warning	ABR	Hughes	28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.