Alert archive / South Dakota / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 482, NWS Sioux Falls, SD

August 3, 2004McCook County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 3, 2004, 10:44 AM CDT for McCook County, South Dakota. It was in force for 31 min. 7 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
Aug 3, 2004, 10:44 AM CDT (15:44 UTC)
Expired
Aug 3, 2004, 11:15 AM CDT
In force
31 min
Issued by
NWS Sioux Falls, SD
Area
Counties, with a storm outline in the text

County McCook County, SD

The radar

The Sioux Falls radar (KFSD), 55 km from the middle of the area, began a volume at 15:47 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
Aug 3, 10:49 AM CDTTSTM WND GST 70Montrose, SD70 MPH WIND GUSTS
Aug 3, 10:49 AM CDTTSTM WND GST 70Montrose, SD70 MPH WIND GUSTS
Aug 3, 10:49 AM CDTTSTM WND GST 70Montrose, SD70 MPH WIND GUSTS IN MONTROSE
Aug 3, 10:49 AM CDTTSTM WND GST 70Montrose, SD70 MPH WIND GUSTS IN MONTROSE
Aug 3, 10:50 AM CDTTSTM WND DMG9 W Salem, SD2 SEMI-TRUCKS TURNED OVER ON I-90 NEAR SPENCER EXIT
Aug 3, 10:50 AM CDTTSTM WND DMG9 W Salem, SD2 SEMI-TRUCKS TURNED OVER ON I-90 NEAR SPENCER EXIT
Aug 3, 10:50 AM CDTTSTM WND DMGSalem, SDGRANDSTAND AT BALLPARK BLOWN OVER...AND A MOBILE HOME WAS SEVERLY DAMAGED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 3, 8:00 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 3.7 hours before the alert went out and 156 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 12:00Z on 2004-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 197 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 12:00Z on 2004-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.193958Sfc1 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
197 J/kg
Mixed-layer CIN
-333 J/kg
Mixed-layer LCL
811 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFSD 031544
SVRFSD
SDC087-031615-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1044 AM CDT TUE AUG 3 2004

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 1115 AM CDT

* AT 1042 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 8 MILES NORTHWEST OF SALEM
  TO 7 MILES NORTH OF BRIDGEWATER TO BRIDGEWATER...OR FROM 26 MILES
  EAST OF MITCHELL TO 21 MILES WEST OF PARKER...MOVING SOUTHEAST AT
  30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SALEM AROUND 1055 AM CDT
  CANISTOTA AROUND 1105 AM CDT
  MONTROSE AROUND 1110 AM CDT

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL AND DAMAGING WIND.
GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4384 9757 4367 9757 4352 9757 4351 9716
      4364 9715 4382 9716

$$

MG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 8:08 PM CDTSevere Thunderstorm WarningFSDBrule37 min
Aug 2, 8:11 PM CDTSevere Thunderstorm WarningFSDAurora, Jerauld34 min
Aug 2, 8:45 PM CDTSevere Thunderstorm WarningFSDAurora, Brule45 min
Aug 2, 9:39 PM CDTSevere Thunderstorm WarningFSDAurora, Douglas36 min
Aug 3, 8:02 AM CDTSevere Thunderstorm WarningFSDBrule28 min
Aug 3, 8:28 AM CDTSevere Thunderstorm WarningFSDBrule, Jerauld32 min
Aug 3, 8:59 AM CDTSevere Thunderstorm WarningFSDAurora31 min
Aug 3, 9:11 AM CDTSevere Thunderstorm WarningFSDJerauld, Sanborn34 min
Aug 3, 9:33 AM CDTSevere Thunderstorm WarningFSDDavison27 min
Aug 3, 9:45 AM CDTSevere Thunderstorm WarningFSDMiner, Sanborn45 min
Aug 3, 9:59 AM CDTSevere Thunderstorm WarningFSDDavison, Hanson46 min
Aug 3, 10:15 AM CDTSevere Thunderstorm WarningFSDMcCook30 min
Aug 3, 10:30 AM CDTSevere Thunderstorm WarningFSDLake, Miner30 min
Aug 3, 10:37 AM CDTSevere Thunderstorm WarningFSDLincoln, Minnehaha, Turner38 min
Aug 3, 11:01 AM CDTSevere Thunderstorm WarningFSDLake29 min
Aug 3, 11:12 AM CDTSevere Thunderstorm WarningFSDMinnehaha33 min
Aug 3, 11:28 AM CDTFlash Flood WarningFSDLincoln, Minnehaha92 min
Aug 3, 11:40 AM CDTSevere Thunderstorm WarningFSDMoody35 min
Aug 3, 11:42 AM CDTSevere Thunderstorm WarningFSDMinnehaha63 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2004Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.