Alert archive / South Dakota / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 501
The Storm Prediction Center issued this severe thunderstorm watch at Jul 9, 2002, 6:00 PM CDT for 11 counties in Nebraska; 26 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2002, 6:00 PM CDT (23:00 UTC)
- Expired
- Jul 9, 2002, 11:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Antelope County, NE, Boyd County, NE, Garfield County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Madison County, NE, Pierce County, NE, Rock County, NE, Wheeler County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clark County, SD, Davison County, SD, Day County, SD, Douglas County, SD, Edmunds County, SD, Faulk County, SD, Gregory County, SD, Hand County, SD, Hanson County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Marshall County, SD, McCook County, SD, McPherson County, SD, Miner County, SD, Sanborn County, SD, Spink County, SD
The radar
The Sioux Falls radar (KFSD), 168 km from the middle of the area, began a volume at 23:02 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
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 6:00 PM CDT | Severe Thunderstorm Warning | LBF | Holt, Rock | 60 min |
| Jul 9, 6:20 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 40 min |
| Jul 9, 6:59 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 61 min |
| Jul 9, 7:03 PM CDT | Severe Thunderstorm Warning | LBF | Rock | 57 min |
| Jul 9, 7:33 PM CDT | Severe Thunderstorm Warning | LBF | Boyd | 57 min |
| Jul 9, 7:51 PM CDT | Severe Thunderstorm Warning | FSD | Brule, Charles Mix | 39 min |
| Jul 9, 8:13 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 62 min |
| Jul 9, 8:21 PM CDT | Severe Thunderstorm Warning | ABR | Marshall | 39 min |
| Jul 9, 8:21 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 39 min |
| Jul 9, 8:30 PM CDT | Severe Thunderstorm Warning | LBF | Boyd | 60 min |
| Jul 9, 8:59 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 46 min |
| Jul 9, 9:16 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson | 44 min |
| Jul 9, 9:28 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix | 32 min |
| Jul 9, 9:48 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 27 min |
| Jul 9, 10:13 PM CDT | Severe Thunderstorm Warning | FSD | McCook | 47 min |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.0 hours before the alert went out and 164 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
- 389 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 725 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Severe Thunderstorm Watches in South Dakota, 2002Severe Thunderstorm Watches in Nebraska, 2002Every severe thunderstorm watch in 2002
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.