Alert archive / South Dakota / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 676
The Storm Prediction Center issued this severe thunderstorm watch at Aug 5, 1997, 8:45 PM CDT for 7 counties in Minnesota; 18 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 1997, 8:45 PM CDT (01:45 UTC)
- Expired
- Aug 6, 1997, 2:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Big Stone County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Stevens County, MN, Traverse County, MN, Yellow Medicine County, MN, Beadle County, SD, Brookings County, SD, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hyde County, SD, Kingsbury County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 62 km from the middle of the area, began a volume at 01:48 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 8:54 PM CDT | Severe Thunderstorm Warning | ABR | Traverse | 76 min |
| Aug 5, 8:54 PM CDT | Tornado Warning | ABR | Traverse | 76 min |
| Aug 5, 9:44 PM CDT | Severe Thunderstorm Warning | ABR | Big Stone | 61 min |
| Aug 5, 9:58 PM CDT | Severe Thunderstorm Warning | ABR | Grant | 47 min |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.8 hours before the alert went out and 12 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
- 39 J/kg
- Mixed-layer CIN
- -162 J/kg
- Mixed-layer LCL
- 1797 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
Nearby
Severe Thunderstorm Watches in South Dakota, 1997Severe Thunderstorm Watches in Minnesota, 1997Every severe thunderstorm watch in 1997
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.