Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 178, NWS Sioux Falls, SD

July 24, 2002Miner County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 24, 2002, 7:21 PM CDT for Miner County, South Dakota. It was in force for 39 min. 1 report 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, 7:21 PM CDT (00:21 UTC)
Expired
Jul 24, 2002, 8:00 PM CDT
In force
39 min
Issued by
NWS Sioux Falls, SD
Area
Counties, with a storm outline in the text

County Miner County, SD

The radar

The Sioux Falls radar (KFSD), 76 km from the middle of the area, began a volume at 00:24 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

TimeReportWhereRemark
Jul 24, 7:40 PM CDTThunderstorm Wind 61 ECanova, SDThunderstorm winds caused damage to trees and power lines. The amount of 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.

IssuedProductOfficeLasted
Jul 24, 4:50 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.4 hours before the alert went out and 125 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2002-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2473 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2002-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

361 
WUUS53 KFSD 250021
SVRFSD
SDC097-250100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
721 PM CDT WED JUL 24 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA

* UNTIL 800 PM CDT

* AT 721 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES SOUTH OF HOWARD...OR ABOUT 22 MILES
  WEST OF MADISON...MOVING SOUTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CANOVA AROUND 735 PM CDT

THIS STORM WILL PRODUCE LARGE HAIL AND DAMAGING WIND. GO INSIDE A
STURDY BUILDING AND STAY AWAY FROM WINDOWS.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE AREA. SEVERE THUNDERSTORMS
CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO
MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 4407 9757 4386 9767 4385 9738 4402 9739

BOUSTEAD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 7:05 PM CDTSevere Thunderstorm WarningFSDDavison, Hanson40 min
Jul 24, 7:17 PM CDTSevere Thunderstorm WarningFSDSanborn13 min
Jul 24, 7:36 PM CDTSevere Thunderstorm WarningFSDMcCook39 min
Jul 24, 7:46 PM CDTSevere Thunderstorm WarningFSDDavison, Hanson29 min
Jul 24, 7:52 PM CDTTornado WarningFSDMcCook23 min
Jul 24, 8:04 PM CDTSevere Thunderstorm WarningFSDTurner56 min
Jul 24, 8:11 PM CDTSevere Thunderstorm WarningFSDMinnehaha34 min
Jul 24, 8:14 PM CDTSevere Thunderstorm WarningFSDMcCook31 min
Jul 24, 8:21 PM CDTSevere Thunderstorm WarningFSDHutchinson24 min
Jul 24, 8:22 PM CDTSevere Thunderstorm WarningFSDLincoln53 min
Jul 24, 8:24 PM CDTSevere Thunderstorm WarningFSDClay, Yankton36 min
Jul 24, 8:46 PM CDTSevere Thunderstorm WarningFSDMinnehaha44 min
Jul 24, 8:51 PM CDTSevere Thunderstorm WarningFSDBrule24 min
Jul 24, 9:06 PM CDTSevere Thunderstorm WarningFSDYankton24 min
Jul 24, 9:15 PM CDTSevere Thunderstorm WarningFSDBrule, Charles Mix30 min
Jul 24, 9:43 PM CDTSevere Thunderstorm WarningFSDCharles Mix47 min
Jul 24, 10:23 PM CDTSevere Thunderstorm WarningFSDCharles Mix37 min
Jul 24, 10:57 PM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix33 min
Jul 25, 1:38 AM CDTSevere Thunderstorm WarningFSDUnion27 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2002Every severe thunderstorm warning 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.