Alert archive / South Dakota / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 448
The Storm Prediction Center issued this severe thunderstorm watch at Jun 24, 2007, 6:30 PM MDT for 9 counties in North Dakota; 17 counties in South Dakota. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 2007, 6:30 PM MDT (00:30 UTC)
- Expired
- Jun 24, 2007, 10:37 PM MDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 26 counties
Adams County, ND, Billings County, ND, Bowman County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Butte County, SD, Campbell County, SD, Corson County, SD, Dewey County, SD, Haakon County, SD, Harding County, SD, Hughes County, SD, Jones County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Rapid City radar (KUDX), 167 km from the middle of the area, began a volume at 00:30 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 6:50 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 55 min |
| Jun 24, 6:54 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 66 min |
| Jun 24, 6:56 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 49 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.5 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
- 3796 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 1514 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 17.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 6:11 PM MDT | Mesoscale Discussion | SPC | Adams | 2 hr |
| Jun 24, 7:11 PM MDT | Mesoscale Discussion | SPC | Benson, Burleigh, Cavalier, Eddy, McHenry, McLean and 10 more | 64 min |
| Jun 24, 8:30 PM MDT | Mesoscale Discussion | SPC | Adams, Grant, Hettinger, Sioux, Stark | 90 min |
| Jun 24, 9:47 PM MDT | Mesoscale Discussion | SPC | Benson, Billings, Bottineau, Bowman, Dunn, Golden Valley and 16 more | 58 min |
| Jun 24, 10:36 PM MDT | Severe Thunderstorm Watch | SPC | Benson, Billings, Bottineau, Burleigh, Cavalier, Dunn and 31 more | 7 hr |
| Jun 25, 2:31 AM MDT | Mesoscale Discussion | SPC | Bottineau, Cavalier, Dunn, McHenry, McLean, Mountrail and 6 more | 89 min |
| Jun 25, 9:12 AM MDT | Mesoscale Discussion | SPC | Divide | 93 min |
| Jun 25, 2:59 PM MDT | Mesoscale Discussion | SPC | Burleigh, Emmons, Grant, Kidder, Logan, Morton and 4 more | 91 min |
| Jun 25, 4:48 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Billings, Bowman, Dunn, Golden Valley, Hettinger and 3 more | 8 hr |
| Jun 25, 5:57 PM MDT | Mesoscale Discussion | SPC | Benson, Cavalier, Eddy, Nelson, Pembina, Ramsey and 3 more | 2 hr |
Nearby
Severe Thunderstorm Watches in South Dakota, 2007Severe Thunderstorm Watches in North Dakota, 2007Every severe thunderstorm watch in 2007
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.