Alert archive / South Dakota / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 168
The Storm Prediction Center issued this severe thunderstorm watch at May 8, 2004, 7:15 PM CDT for 26 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 8, 2004, 7:15 PM CDT (00:15 UTC)
- Expired
- May 9, 2004, 1:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Brown County, SD, Buffalo County, SD, Campbell County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Potter County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Tripp County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Rapid City radar (KUDX), 149 km from the middle of the area, began a volume at 00:17 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 7:16 PM CDT | Severe Thunderstorm Warning | UNR | Haakon | 59 min |
| May 8, 7:31 PM CDT | Severe Thunderstorm Warning | UNR | Pennington | 44 min |
| May 8, 8:15 PM CDT | Severe Thunderstorm Warning | UNR | Haakon | 45 min |
| May 8, 8:37 PM CDT | Severe Thunderstorm Warning | UNR | Haakon | 23 min |
| May 8, 9:20 PM CDT | Severe Thunderstorm Warning | ABR | Walworth | 40 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.3 hours before the alert went out and 267 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
- 196 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 2876 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 9:17 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bennett, Brown, Brule, Buffalo and 32 more | 88 min |
| May 9, 2:00 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brookings, Brown, Clark, Codington and 16 more | 3 hr |
| May 9, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Bon Homme, Brookings, Deuel, Douglas, Hanson, Hutchinson and 8 more | 6 hr |
| May 9, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Union | 6 hr |
| May 9, 5:38 PM CDT | Mesoscale Discussion | SPC | Clay, Hutchinson, Lincoln, McCook, Minnehaha, Moody and 3 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.