Alert archive / South Dakota / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 694

August 3, 200420 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Aug 3, 2004, 8:00 AM CDT for 20 counties in South Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Aug 3, 2004, 8:00 AM CDT (13:00 UTC)
Expired
Aug 3, 2004, 1:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Aurora County, SD, Beadle County, SD, Brule County, SD, Buffalo County, SD, Davison County, SD, Douglas County, SD, Hand County, SD, Hanson County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD

The radar

The Sioux Falls radar (KFSD), 137 km from the middle of the area, began a volume at 13:00 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.

Warnings issued inside it

18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 3, 8:02 AM CDTSevere Thunderstorm WarningABRBuffalo, Hand, Hyde58 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 WarningABRBuffalo16 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, 10:44 AM CDTSevere Thunderstorm WarningFSDMcCook31 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

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 1.0 hours before the alert went out and 93 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

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 2, 7:47 PM CDTMesoscale DiscussionSPCAurora, Bennett, Bon Homme, Brule, Buffalo, Charles Mix and 19 more58 min
Aug 2, 9:07 PM CDTMesoscale DiscussionSPCButte, Harding, Lawrence, Meade53 min
Aug 3, 2:02 AM CDTMesoscale DiscussionSPCAurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 17 more118 min
Aug 3, 2:30 AM CDTMesoscale DiscussionSPCHaakon, Hughes, Jones, Meade, Stanley, Ziebach2 hr
Aug 3, 3:00 AM CDTSevere Thunderstorm WatchSPCBuffalo, Haakon, Hughes, Hyde, Jones, Lyman and 4 more5 hr
Aug 3, 5:04 AM CDTMesoscale DiscussionSPCBuffalo, Haakon, Hughes, Hyde, Jones, Lyman and 2 more116 min
Aug 3, 7:21 AM CDTMesoscale DiscussionSPCAurora, Beadle, Brule, Buffalo, Davison, Douglas and 17 more54 min
Aug 3, 10:48 AM CDTMesoscale DiscussionSPCLincoln, Minnehaha, Moody, Turner87 min
Aug 3, 2:53 PM CDTMesoscale DiscussionSPCButte, Custer, Harding, Lawrence, Meade, Pennington and 1 more2 hr

Nearby

Severe Thunderstorm Watches in South Dakota, 2004Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.