Alert archive / South Dakota / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 754
The Storm Prediction Center issued this severe thunderstorm watch at Aug 15, 2004, 1:50 PM MDT for 8 counties in Nebraska; 17 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2004, 1:50 PM MDT (19:50 UTC)
- Expired
- Aug 15, 2004, 8:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Arthur County, NE, Cherry County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keya Paha County, NE, Sheridan County, NE, Aurora County, SD, Bennett County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Faulk County, SD, Gregory County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Todd County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 142 km from the middle of the area, began a volume at 19:50 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
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 2:18 PM MDT | Severe Thunderstorm Warning | UNR | Todd | 57 min |
| Aug 15, 2:22 PM MDT | Severe Thunderstorm Warning | ABR | Lyman | 38 min |
| Aug 15, 2:34 PM MDT | Severe Thunderstorm Warning | UNR | Mellette | 41 min |
| Aug 15, 2:58 PM MDT | Severe Thunderstorm Warning | ABR | Lyman | 62 min |
| Aug 15, 3:09 PM MDT | Severe Thunderstorm Warning | UNR | Todd | 66 min |
| Aug 15, 3:14 PM MDT | Severe Thunderstorm Warning | LBF | Sheridan | 61 min |
| Aug 15, 3:46 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 59 min |
| Aug 15, 4:14 PM MDT | Tornado Warning | LBF | Sheridan | 61 min |
| Aug 15, 4:20 PM MDT | Severe Thunderstorm Warning | UNR | Todd | 55 min |
| Aug 15, 4:22 PM MDT | Severe Thunderstorm Warning | UNR | Todd | 53 min |
| Aug 15, 4:35 PM MDT | Severe Thunderstorm Warning | FSD | Jerauld, Sanborn | 40 min |
| Aug 15, 4:45 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 60 min |
| Aug 15, 4:46 PM MDT | Severe Thunderstorm Warning | ABR | Hand | 29 min |
| Aug 15, 4:49 PM MDT | Severe Thunderstorm Warning | UNR | Bennett | 26 min |
| Aug 15, 4:58 PM MDT | Tornado Warning | LBF | Cherry | 47 min |
| Aug 15, 5:10 PM MDT | Tornado Warning | LBF | Sheridan | 50 min |
| Aug 15, 5:44 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 31 min |
| Aug 15, 6:16 PM MDT | Severe Thunderstorm Warning | LBF | Arthur, Grant | 44 min |
| Aug 15, 6:43 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 47 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
Rapid City, SD (KUNR), launched 12:00Z, 7.8 hours before the alert went out and 189 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
- 4 J/kg
- Mixed-layer CIN
- -203 J/kg
- Mixed-layer LCL
- 2064 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 12:43 PM MDT | Mesoscale Discussion | SPC | Box Butte, Cherry, Dawes, Sheridan, Sioux | 2 hr |
| Aug 15, 4:01 PM MDT | Mesoscale Discussion | SPC | Boyd, Cherry, Grant, Keya Paha, Knox, Sheridan | 119 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2004Severe Thunderstorm Watches in Nebraska, 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.