Alert archive / South Dakota / Severe Thunderstorm Watches in 2006
Severe Thunderstorm Watch 705
The Storm Prediction Center issued this severe thunderstorm watch at Aug 10, 2006, 3:27 PM CDT for 20 counties in South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2006, 3:27 PM CDT (20:27 UTC)
- Expired
- Aug 10, 2006, 10:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Buffalo County, SD, Butte County, SD, Campbell County, SD, Corson County, SD, Dewey County, SD, Faulk County, SD, Haakon County, SD, Hand County, SD, Harding County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lyman County, SD, Meade 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), 143 km from the middle of the area, began a volume at 20:27 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:29 PM CDT | Severe Thunderstorm Warning | ABR | Corson | 46 min |
| Aug 10, 4:43 PM CDT | Flash Flood Warning | ABR | Corson | 3 hr |
| Aug 10, 4:57 PM CDT | Severe Thunderstorm Warning | ABR | Potter | 33 min |
| Aug 10, 5:02 PM CDT | Severe Thunderstorm Warning | ABR | Dewey | 43 min |
| Aug 10, 5:12 PM CDT | Severe Thunderstorm Warning | UNR | Meade, Perkins | 63 min |
| Aug 10, 5:25 PM CDT | Flash Flood Warning | ABR | Dewey | 3 hr |
| Aug 10, 5:32 PM CDT | Severe Thunderstorm Warning | ABR | Potter, Sully | 43 min |
| Aug 10, 5:33 PM CDT | Severe Thunderstorm Warning | ABR | Walworth | 20 min |
| Aug 10, 5:47 PM CDT | Severe Thunderstorm Warning | ABR | Dewey | 28 min |
| Aug 10, 6:15 PM CDT | Severe Thunderstorm Warning | ABR | Sully | 45 min |
| Aug 10, 6:52 PM CDT | Severe Thunderstorm Warning | ABR | Hyde | 38 min |
| Aug 10, 6:57 PM CDT | Severe Thunderstorm Warning | ABR | Hughes | 48 min |
| Aug 10, 7:12 PM CDT | Severe Thunderstorm Warning | ABR | Hand | 48 min |
| Aug 10, 7:32 PM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Hyde | 58 min |
| Aug 10, 7:38 PM CDT | Severe Thunderstorm Warning | ABR | Jones | 67 min |
| Aug 10, 8:02 PM CDT | Severe Thunderstorm Warning | ABR | Hand | 58 min |
| Aug 10, 8:21 PM CDT | Severe Thunderstorm Warning | ABR | Lyman | 24 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 12:00Z, 8.5 hours before the alert went out and 198 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
- 683 J/kg
- Mixed-layer CIN
- -233 J/kg
- Mixed-layer LCL
- 914 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 8:07 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brookings, Clark, Codington, Davison and 18 more | 83 min |
| Aug 9, 9:37 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Clark, Codington, Day, Deuel, Edmunds and 6 more | 4 hr |
| Aug 10, 12:52 AM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brookings, Davison, Douglas, Hanson and 10 more | 83 min |
| Aug 10, 2:52 AM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Edmunds, McPherson | 83 min |
| Aug 10, 3:07 PM CDT | Mesoscale Discussion | SPC | Beadle, Brown, Buffalo, Butte, Campbell, Corson and 22 more | 113 min |
| Aug 10, 6:04 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 22 more | 86 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2006Every severe thunderstorm watch in 2006
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.