Alert archive / South Dakota / Tornado Warnings in 2002

Tornado Warning 11, NWS Sioux Falls, SD

July 28, 2002Brookings County, Kingsbury County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 28, 2002, 1:59 PM CDT for Brookings County, Kingsbury County, South Dakota. It was in force for 41 min. 3 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 28, 2002, 1:59 PM CDT (18:59 UTC)
Expired: Jul 28, 2002, 2:40 PM CDT
In force: 41 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

Counties Brookings County, SD, Kingsbury County, SD

The radar

The Sioux Falls radar (KFSD), 89 km from the middle of the area, began a volume at 19:02 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 28, 2:05 PM CDT	Hail 0.75	Sinai, SD	Large hail, accompanied by 50 mph winds, caused crop damage. The amount of crop damage was not known.
Jul 28, 2:07 PM CDT	Tornado F0	Sinai, SD	A tornado caused no reported damage.
Jul 28, 2:10 PM CDT	Thunderstorm Wind 78 E	Sinai, SD	Thunderstorm winds caused widespread structural, tree, and power line damage in and near Sinai. The roof was ripped off a mobile home, a well drilling business was destroyed, the siding from another business was ripped off, part of a grain elevator was smashed

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
Jul 28, 1:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 7.0 hours before the alert went out and 118 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: 99 J/kg
Mixed-layer CIN: -249 J/kg
Mixed-layer LCL: 1295 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 255 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

302 
WFUS53 KFSD 281859
TORFSD
SDC011-077-281940-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
158 PM CDT SUN JUL 28 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA
  EASTERN KINGSBURY COUNTY IN EAST CENTRAL SOUTH DAKOTA

* UNTIL 240 PM CDT

* AT 158 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A DEVELOPING TORNADO 5 MILES NORTHEAST OF
  OLDHAM...OR ABOUT 19 MILES NORTH OF MADISON...MOVING EAST AT 20
  MPH.

* SOME LOCATIONS AFFECTED...
  ARLINGTON AROUND 205 PM CDT
  SINAI AROUND 220 PM CDT
  VOLGA AROUND 230 PM CDT

THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. TAKE
COVER NOW.

THIS THUNDERSTORM CAN PRODUCE A TORNADO AT ANY TIME. TAKE SHELTER
NOW.

LAT...LON 4437 9732 4421 9735 4420 9684 4452 9689

BOUSTEAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:02 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	38 min
Jul 28, 12:57 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury	33 min
Jul 28, 1:23 PM CDT	Tornado Warning	FSD	Kingsbury	37 min
Jul 28, 1:25 PM CDT	Severe Thunderstorm Warning	FSD	Sanborn	35 min
Jul 28, 1:40 PM CDT	Severe Thunderstorm Warning	FSD	Miner	50 min
Jul 28, 2:12 PM CDT	Tornado Warning	FSD	Brookings	48 min
Jul 28, 2:21 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Moody	39 min
Jul 28, 2:48 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Moody	42 min
Jul 28, 2:59 PM CDT	Severe Thunderstorm Warning	FSD	Brookings	31 min
Jul 28, 3:19 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha	41 min
Jul 28, 3:27 PM CDT	Severe Thunderstorm Warning	FSD	Moody	33 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.