Alert archive / South Dakota / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 655
The Storm Prediction Center issued this severe thunderstorm watch at Jun 24, 1998, 3:30 PM MDT for 34 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 1998, 3:30 PM MDT (21:30 UTC)
- Expired
- Jun 24, 1998, 9:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 34 counties
Bennett County, SD, Brule County, SD, Buffalo County, SD, Butte County, SD, Campbell County, SD, Charles Mix County, SD, Corson County, SD, Custer County, SD, Dewey County, SD, Edmunds County, SD, Fall River County, SD, Faulk County, SD, Gregory County, SD, Haakon County, SD, Hand County, SD, Harding County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Rapid City radar (KUDX), 176 km from the middle of the area, began a volume at 21:29 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
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 5:02 PM MDT | Severe Thunderstorm Warning | UNR | Tripp | 33 min |
| Jun 24, 5:50 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Fall River | 45 min |
| Jun 24, 6:02 PM MDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 48 min |
| Jun 24, 6:12 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 33 min |
| Jun 24, 6:20 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 50 min |
| Jun 24, 6:30 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 45 min |
| Jun 24, 6:43 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 47 min |
| Jun 24, 6:50 PM MDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 35 min |
| Jun 24, 7:28 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 32 min |
| Jun 24, 7:51 PM MDT | Severe Thunderstorm Warning | UNR | Mellette | 34 min |
| Jun 24, 7:54 PM MDT | Severe Thunderstorm Warning | ABR | McPherson | 26 min |
| Jun 24, 8:20 PM MDT | Tornado Warning | ABR | McPherson | 50 min |
| Jun 24, 8:53 PM MDT | Severe Thunderstorm Warning | ABR | Stanley | 32 min |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 9.5 hours before the alert went out and 182 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
- 340 J/kg
- Mixed-layer CIN
- -331 J/kg
- Mixed-layer LCL
- 1992 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 61 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 |
|---|---|---|---|---|
| Jun 23, 6:15 PM MDT | Tornado Watch | SPC | Union | 6 hr |
| Jun 23, 6:30 PM MDT | Tornado Watch | SPC | Clay, Lincoln, Minnehaha, Union | 6 hr |
| Jun 24, 5:30 PM MDT | Tornado Watch | SPC | Aurora, Bon Homme, Brule, Charles Mix, Clay, Davison and 13 more | 7 hr |
Nearby
Severe Thunderstorm Watches in South Dakota, 1998Every severe thunderstorm watch in 1998
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.