Alert archive / South Dakota / Tornado Warnings in 2002

Tornado Warning 12, NWS Sioux Falls, SD

July 28, 2002Brookings County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 28, 2002, 2:12 PM CDT for Brookings County, South Dakota. It was in force for 48 min. 2 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, 2:12 PM CDT (19:12 UTC)
Expired: Jul 28, 2002, 3:00 PM CDT
In force: 48 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Brookings County, SD

The radar

The Sioux Falls radar (KFSD), 87 km from the middle of the area, began a volume at 19:13 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, 2:30 PM CDT	Hail 1	Brookings, SD	Large hail, driven by severe winds, damaged vehicles and crops. The amount of crop damage was not known.
Jul 28, 2:30 PM CDT	Thunderstorm Wind 52 E	Brookings, SD	Thunderstorm winds caused tree damage, and damaged the siding of a mobile home. The winds, along with large hail, also damaged crops, but the amount of crop damage was not known.

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, 7.2 hours before the alert went out and 134 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.

011 
WFUS53 KFSD 281912
TORFSD
SDC011-282000-

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

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

* UNTIL 300 PM CDT

* AT 211 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADIC THUNDERSTORM 3 MILES NORTH OF SINAI...OR ABOUT 14 MILES
  WEST OF BROOKINGS...MOVING EAST AT 35 MPH.

* SOME LOCATIONS AFFECTED...
  VOLGA...BRUCE AROUND 220 PM CDT
  BROOKINGS AROUND 230 PM CDT
  AURORA...WHITE AROUND 240 PM CDT

THIS EXTENDS THE PREVIOUSLY ISSUED TORNADO WARNING FOR WESTERN 
BROOKINGS COUNTY UNTIL 300 PM. 

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

THIS STORM HAS PRODUCED A TORNADO. IF YOU ARE IN THE PATH OF THIS
STORM...TAKE COVER IMMEDIATELY.

TAKE COVER IMMEDIATELY. ABANDON MOBILE HOMES AND FIND SHELTER IN A
NEARBY STURDY BUILDING.

LAT...LON 4446 9713 4421 9712 4420 9652 4448 9651

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, 1:59 PM CDT	Tornado Warning	FSD	Brookings, Kingsbury	41 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.