Alert archive / South Dakota / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 439
The Storm Prediction Center issued this severe thunderstorm watch at Jun 18, 2001, 12:00 AM CDT for 32 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2001, 12:00 AM CDT (05:00 UTC)
- Expired
- Jun 18, 2001, 6:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Aurora County, SD, Beadle County, SD, Brule County, SD, Buffalo County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lyman County, SD, McCook County, SD, Mellette County, SD, Miner County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Aberdeen radar (KABR), 150 km from the middle of the area, began a volume at 05:01 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
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 12:26 AM CDT | Severe Thunderstorm Warning | UNR | Mellette | 49 min |
| Jun 18, 12:35 AM CDT | Severe Thunderstorm Warning | ABR | Jones | 55 min |
| Jun 18, 1:16 AM CDT | Severe Thunderstorm Warning | ABR | Lyman | 59 min |
| Jun 18, 2:38 AM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Hand | 37 min |
| Jun 18, 2:39 AM CDT | Severe Thunderstorm Warning | FSD | Beadle | 36 min |
| Jun 18, 3:09 AM CDT | Severe Thunderstorm Warning | FSD | Beadle | 51 min |
| Jun 18, 4:29 AM CDT | Severe Thunderstorm Warning | FSD | Lake, Miner | 31 min |
| Jun 18, 4:38 AM CDT | Severe Thunderstorm Warning | FSD | Kingsbury | 22 min |
| Jun 18, 4:59 AM CDT | Severe Thunderstorm Warning | ABR | Buffalo | 46 min |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 5.0 hours before the alert went out and 126 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
- 19 J/kg
- Mixed-layer CIN
- -453 J/kg
- Mixed-layer LCL
- 1102 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 520 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 18, 2:00 AM CDT | Severe Thunderstorm Watch | SPC | Harding, Perkins | 5 hr |
| Jun 18, 5:15 AM CDT | Severe Thunderstorm Watch | SPC | Brookings, Deuel, Grant, Lake, Moody, Roberts | 6 hr |
| Jun 18, 6:00 AM CDT | Severe Thunderstorm Watch | SPC | Brown, Campbell, Corson, Day, Dewey, Edmunds and 4 more | 5 hr |
Nearby
Severe Thunderstorm Watches in South Dakota, 2001Every severe thunderstorm watch in 2001
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.