Alert archive / South Dakota / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 669
The Storm Prediction Center issued this severe thunderstorm watch at Aug 2, 1997, 4:00 PM CDT for 12 counties in North Dakota; 27 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 1997, 4:00 PM CDT (21:00 UTC)
- Expired
- Aug 2, 1997, 10:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Barnes County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Stutsman County, ND, Beadle County, SD, Brown County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lake County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Miner County, SD, Potter County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Sully County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 59 km from the middle of the area, began a volume at 21:00 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
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 4:17 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Spink | 48 min |
| Aug 2, 4:24 PM CDT | Severe Thunderstorm Warning | ABR | Campbell | 61 min |
| Aug 2, 4:28 PM CDT | Severe Thunderstorm Warning | ABR | Sully | 62 min |
| Aug 2, 4:32 PM CDT | Severe Thunderstorm Warning | BIS | Dickey | 28 min |
| Aug 2, 4:41 PM CDT | Severe Thunderstorm Warning | FGF | Sargent | 34 min |
| Aug 2, 4:41 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Marshall | 59 min |
| Aug 2, 5:05 PM CDT | Severe Thunderstorm Warning | ABR | Spink | 50 min |
| Aug 2, 5:10 PM CDT | Severe Thunderstorm Warning | ABR | Potter | 65 min |
| Aug 2, 5:21 PM CDT | Severe Thunderstorm Warning | FGF | Sargent | 39 min |
| Aug 2, 5:42 PM CDT | Severe Thunderstorm Warning | ABR | Marshall | 48 min |
| Aug 2, 6:08 PM CDT | Severe Thunderstorm Warning | ABR | Sully | 47 min |
| Aug 2, 6:13 PM CDT | Severe Thunderstorm Warning | ABR | Spink | 47 min |
| Aug 2, 6:25 PM CDT | Severe Thunderstorm Warning | FGF | Richland | 50 min |
| Aug 2, 6:32 PM CDT | Severe Thunderstorm Warning | ABR | Day | 63 min |
| Aug 2, 6:57 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 33 min |
| Aug 2, 7:22 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 38 min |
| Aug 2, 7:59 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 31 min |
| Aug 2, 8:09 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 36 min |
| Aug 2, 8:11 PM CDT | Severe Thunderstorm Warning | FSD | Beadle | 49 min |
| Aug 2, 8:37 PM CDT | Severe Thunderstorm Warning | FSD | Sanborn | 33 min |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 9.0 hours before the alert went out and 68 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
- 1632 J/kg
- Mixed-layer CIN
- -142 J/kg
- Mixed-layer LCL
- 1299 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Brookings, Deuel, Grant | 6 hr |
Nearby
Severe Thunderstorm Watches in South Dakota, 1997Severe Thunderstorm Watches in North Dakota, 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.