Alert archive / South Dakota / Tornado Watches in 2010
Tornado Watch 549
The Storm Prediction Center issued this tornado watch at Jul 29, 2010, 3:30 PM CDT for 5 counties in Nebraska; 11 counties in South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 29, 2010, 3:30 PM CDT (20:30 UTC)
- Expired
- Jul 29, 2010, 10:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3.5 in
- Strongest gust expected
- 70 kt
Counties Brown County, NE, Cherry County, NE, Keya Paha County, NE, Rock County, NE, Sheridan County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Pennington County, SD, Todd County, SD, Tripp County, SD
The radar
The Rapid City radar (KUDX), 112 km from the middle of the area, began a volume at 20:30 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
- 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
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 3:53 PM CDT | Severe Thunderstorm Warning | UNR | Custer, Pennington | 42 min |
| Jul 29, 4:56 PM CDT | Severe Thunderstorm Warning | UNR | Bennett, Todd | 64 min |
| Jul 29, 5:38 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 37 min |
| Jul 29, 6:28 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 62 min |
| Jul 29, 6:36 PM CDT | Tornado Warning | LBF | Cherry | 24 min |
| Jul 29, 6:38 PM CDT | Severe Thunderstorm Warning | UNR | Custer, Fall River | 53 min |
| Jul 29, 7:31 PM CDT | Flash Flood Warning | LBF | Cherry | 3 hr |
| Jul 29, 8:07 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Lyman | 38 min |
| Jul 29, 8:18 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 57 min |
| Jul 29, 8:51 PM CDT | Severe Thunderstorm Warning | LBF | Cherry, Garden, Grant, Hooker | 39 min |
| Jul 29, 8:58 PM CDT | Severe Thunderstorm Warning | LBF | Cherry, Thomas | 47 min |
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 |
|---|---|---|---|---|
| Jul 29, 2:46 PM CDT | Mesoscale Discussion | SPC | Cherry, Keya Paha | 59 min |
| Jul 29, 6:12 PM CDT | Mesoscale Discussion | SPC | Brown, Cherry, Keya Paha, Rock, Sheridan | 93 min |
Nearby
Tornado Watches in South Dakota, 2010Tornado Watches in Nebraska, 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.