Alert archive / South Dakota / Tornado Watches in 2010
Tornado Watch 636
The Storm Prediction Center issued this tornado watch at Aug 30, 2010, 6:44 PM CDT for 17 counties in Minnesota; 24 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2010, 6:44 PM CDT (23:44 UTC)
- Expired
- Aug 30, 2010, 11:43 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 41 counties
Big Stone County, MN, Chippewa County, MN, Douglas County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Pipestone County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Yellow Medicine County, MN, Aurora County, SD, Bon Homme County, SD, Brookings County, SD, Charles Mix County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 74 km from the middle of the area, began a volume at 23:44 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- 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
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 6:44 PM CDT | Severe Thunderstorm Warning | FSD | Beadle, Kingsbury, Miner, Sanborn | 46 min |
| Aug 30, 6:57 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Douglas, Hutchinson | 33 min |
| Aug 30, 7:07 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison, Hanson, Sanborn | 23 min |
| Aug 30, 7:19 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Hutchinson, Turner, Yankton | 26 min |
| Aug 30, 8:40 PM CDT | Severe Thunderstorm Warning | ABR | Deuel, Grant | 35 min |
| Aug 30, 10:24 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Pipestone | 36 min |
| Aug 30, 10:33 PM CDT | Flash Flood Warning | FSD | Aurora, Davison, Sanborn | 3 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 3:23 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Traverse | 6 hr |
| Aug 30, 3:53 PM CDT | Tornado Watch | SPC | Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more | 6 hr |
| Aug 30, 5:57 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 10 more | 93 min |
| Aug 30, 6:22 PM CDT | Mesoscale Discussion | SPC | Big Stone, Chippewa, Lac qui Parle, Lincoln, Pipestone, Stevens and 3 more | 53 min |
| Aug 30, 2:45 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bon Homme, Brown, Brule, Buffalo and 31 more | 30 min |
| Aug 30, 3:35 PM CDT | Mesoscale Discussion | SPC | Campbell, Corson, Edmunds, McPherson, Walworth | 55 min |
| Aug 30, 4:49 PM CDT | Mesoscale Discussion | SPC | Harding | 56 min |
Nearby
Tornado Watches in South Dakota, 2010Tornado Watches in Minnesota, 2010Every tornado watch in 2010
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.