Alert archive / South Dakota / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 588
The Storm Prediction Center issued this severe thunderstorm watch at Aug 9, 2002, 5:35 PM CDT for 7 counties in Minnesota; 28 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2002, 5:35 PM CDT (22:35 UTC)
- Expired
- Aug 9, 2002, 11:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Big Stone County, MN, Lac qui Parle County, MN, Lincoln County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Marshall County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD
The radar
The Sioux Falls radar (KFSD), 118 km from the middle of the area, began a volume at 22:35 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
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 5:56 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Sanborn | 34 min |
| Aug 9, 5:59 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 46 min |
| Aug 9, 6:11 PM CDT | Tornado Warning | FSD | Davison, Sanborn | 34 min |
| Aug 9, 6:32 PM CDT | Tornado Warning | ABR | Traverse | 28 min |
| Aug 9, 6:35 PM CDT | Severe Thunderstorm Warning | ABR | Big Stone | 25 min |
| Aug 9, 6:46 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 44 min |
| Aug 9, 8:43 PM CDT | Severe Thunderstorm Warning | FSD | Kingsbury | 47 min |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 10.6 hours before the alert went out and 89 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
- 20 J/kg
- Mixed-layer CIN
- -386 J/kg
- Mixed-layer LCL
- 1144 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- -1 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 8, 8:50 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Norman, Polk, Red Lake, Wilkin | 5 hr |
Nearby
Severe Thunderstorm Watches in South Dakota, 2002Severe Thunderstorm Watches in Minnesota, 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.