Alert archive / South Dakota / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 599
The Storm Prediction Center issued this severe thunderstorm watch at Jul 10, 2004, 5:25 PM CDT for 36 counties in South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 10, 2004, 5:25 PM CDT (22:25 UTC)
- Expired
- Jul 11, 2004, 12:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 36 counties
Aurora County, SD, Beadle County, SD, Brookings County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lyman County, SD, Marshall County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Potter County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Sully County, SD, Tripp County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 77 km from the middle of the area, began a volume at 22:27 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
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 5:26 PM CDT | Severe Thunderstorm Warning | ABR | Hughes | 49 min |
| Jul 10, 5:37 PM CDT | Severe Thunderstorm Warning | ABR | Lyman | 38 min |
| Jul 10, 6:17 PM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Lyman | 43 min |
| Jul 10, 9:33 PM CDT | Severe Thunderstorm Warning | ABR | Hand | 42 min |
| Jul 10, 10:00 PM CDT | Severe Thunderstorm Warning | FSD | Beadle | 45 min |
| Jul 10, 11:18 PM CDT | Severe Thunderstorm Warning | FSD | Jerauld | 27 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, 10.4 hours before the alert went out and 31 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.
- Mixed-layer CAPE
- 1097 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 837 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 7:29 PM CDT | Mesoscale Discussion | SPC | Butte, Corson, Dewey, Haakon, Harding, Meade and 3 more | 2 hr |
| Jul 10, 12:02 PM CDT | Mesoscale Discussion | SPC | Bennett, Corson, Dewey, Haakon, Jackson, Oglala Lakota and 6 more | 118 min |
| Jul 10, 12:25 PM CDT | Severe Thunderstorm Watch | SPC | Bennett, Corson, Dewey, Haakon, Jackson, Jones and 10 more | 7 hr |
| Jul 10, 3:35 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brookings, Brown, Brule, Buffalo and 26 more | 85 min |
| Jul 10, 3:39 PM CDT | Mesoscale Discussion | SPC | Harding | 2 hr |
| Jul 10, 3:56 PM CDT | Mesoscale Discussion | SPC | Harding | 2 hr |
| Jul 10, 5:10 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brown, Brule, Buffalo, Clark and 18 more | 2 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.