Alert archive / South Dakota / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 649
The Storm Prediction Center issued this severe thunderstorm watch at Jul 24, 1997, 7:45 PM CDT for 18 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 24, 1997, 7:45 PM CDT (00:45 UTC)
- Expired
- Jul 25, 1997, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Aurora County, SD, Bennett County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Gregory County, SD, Haakon 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, Stanley County, SD, Todd County, SD, Tripp County, SD
The radar
The Rapid City radar (KUDX), 170 km from the middle of the area, began a volume at 00:47 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
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 8:20 PM CDT | Severe Thunderstorm Warning | UNR | Mellette | 65 min |
| Jul 24, 8:36 PM CDT | Severe Thunderstorm Warning | ABR | Jones | 64 min |
| Jul 24, 8:42 PM CDT | Severe Thunderstorm Warning | UNR | Haakon | 33 min |
| Jul 24, 8:57 PM CDT | Severe Thunderstorm Warning | UNR | Jackson | 63 min |
| Jul 24, 9:21 PM CDT | Severe Thunderstorm Warning | UNR | Mellette | 64 min |
| Jul 24, 10:20 PM CDT | Severe Thunderstorm Warning | UNR | Tripp | 60 min |
| Jul 24, 11:14 PM CDT | Severe Thunderstorm Warning | UNR | Tripp | 31 min |
| Jul 24, 11:21 PM CDT | Severe Thunderstorm Warning | ABR | Lyman | 34 min |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 0.8 hours before the alert went out and 174 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
- 600 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 1314 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -61 m²/s²
- 0-3 km storm-relative helicity
- -15 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.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Bon Homme, Brookings, Clark, Clay and 19 more | 6 hr |
| Jul 25, 6:00 PM CDT | Tornado Watch | SPC | Beadle, Brookings, Brown, Campbell, Clark, Codington and 17 more | 5 hr |
Nearby
Severe Thunderstorm Watches in South 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.