Alert archive / Nebraska / Tornado Watches in 2010
Tornado Watch 589
The Storm Prediction Center issued this tornado watch at Aug 8, 2010, 4:06 PM CDT for 9 counties in Nebraska; Bon Homme County, Clay County, Yankton County, South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2010, 4:06 PM CDT (21:06 UTC)
- Expired
- Aug 8, 2010, 10:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 70 kt
Counties Antelope County, NE, Cedar County, NE, Dixon County, NE, Holt County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Stanton County, NE, Wayne County, NE, Bon Homme County, SD, Clay County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 146 km from the middle of the area, began a volume at 21:08 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
- 40%
- 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
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 4:07 PM CDT | Severe Thunderstorm Warning | OAX | Knox | 53 min |
| Aug 8, 4:16 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Douglas, Hutchinson | 44 min |
| Aug 8, 4:23 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 52 min |
| Aug 8, 4:30 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 33 min |
| Aug 8, 4:33 PM CDT | Flash Flood Warning | FSD | Bon Homme, Charles Mix, Hutchinson | 3 hr |
| Aug 8, 4:52 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Knox | 53 min |
| Aug 8, 4:54 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Yankton | 51 min |
| Aug 8, 4:59 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Knox, Pierce | 46 min |
| Aug 8, 5:08 PM CDT | Flash Flood Warning | FSD | Clay, Hutchinson, Turner, Yankton | 4 hr |
| Aug 8, 5:26 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 34 min |
| Aug 8, 5:32 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Hutchinson, Turner, Yankton | 43 min |
| Aug 8, 5:45 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Cedar, Knox, Pierce, Wayne | 60 min |
| Aug 8, 5:56 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Lincoln, Turner, Union | 34 min |
| Aug 8, 6:08 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Pierce | 37 min |
| Aug 8, 6:16 PM CDT | Severe Thunderstorm Warning | FSD | Dixon | 29 min |
| Aug 8, 6:40 PM CDT | Severe Thunderstorm Warning | FSD | Dakota, Dixon | 65 min |
| Aug 8, 7:29 PM CDT | Severe Thunderstorm Warning | OAX | Wayne | 19 min |
| Aug 8, 7:30 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Boone, Madison | 45 min |
| Aug 8, 8:22 PM CDT | Tornado Warning | OAX | Madison, Stanton | 38 min |
| Aug 8, 8:50 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Cuming, Stanton, Thurston | 55 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
Omaha, NE (KOAX), launched 12:00Z, 9.1 hours before the alert went out and 183 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
- 2728 J/kg
- Mixed-layer CIN
- -172 J/kg
- Mixed-layer LCL
- 1079 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 266 m²/s²
- 0-3 km storm-relative helicity
- 308 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 2:19 PM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Burt, Cedar, Colfax, Cuming and 15 more | 86 min |
| Aug 8, 2:32 PM CDT | Severe Thunderstorm Watch | SPC | Antelope, Boyd, Cedar, Cuming, Dakota, Dixon and 11 more | 7 hr |
| Aug 8, 3:44 PM CDT | Mesoscale Discussion | SPC | Antelope, Cedar, Cuming, Dakota, Dixon, Knox and 3 more | 91 min |
| Aug 8, 4:03 PM CDT | Mesoscale Discussion | SPC | Dawson, Dundy, Franklin, Frontier, Furnas, Gosper and 7 more | 57 min |
| Aug 8, 5:47 PM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Boone, Boyd, Buffalo, Burt and 45 more | 58 min |
| Aug 8, 4:51 PM CDT | Mesoscale Discussion | SPC | Brookings, Codington, Deuel, Grant, Hamlin, Kingsbury and 3 more | 54 min |
Nearby
Tornado Watches in Nebraska, 2010Tornado Watches in South Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.