Alert archive / Nebraska / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 619
The Storm Prediction Center issued this severe thunderstorm watch at Jul 10, 2011, 7:24 PM CDT for 4 counties in Kansas; 44 counties in Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 10, 2011, 7:24 PM CDT (00:24 UTC)
- Expired
- Jul 11, 2011, 1:38 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 48 counties
Cheyenne County, KS, Decatur County, KS, Norton County, KS, Rawlins County, KS, Adams County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Perkins County, NE, Phelps County, NE, Polk County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, York County, NE
The radar
The North Platte radar (KLNX), 111 km from the middle of the area, began a volume at 00:24 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
- 5%
- Ten or more severe wind reports
- 30%
- 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
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:30 PM CDT | Severe Thunderstorm Warning | LBF | Logan, McPherson | 60 min |
| Jul 10, 7:33 PM CDT | Severe Thunderstorm Warning | GLD | Cheyenne, Rawlins | 57 min |
| Jul 10, 7:38 PM CDT | Severe Thunderstorm Warning | GLD | Decatur, Norton | 67 min |
| Jul 10, 7:51 PM CDT | Severe Thunderstorm Warning | GLD | Decatur, Rawlins | 54 min |
| Jul 10, 8:02 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 58 min |
| Jul 10, 8:17 PM CDT | Severe Thunderstorm Warning | GLD | Norton | 35 min |
| Jul 10, 8:19 PM CDT | Severe Thunderstorm Warning | GID | Furnas | 41 min |
| Jul 10, 8:33 PM CDT | Severe Thunderstorm Warning | GLD | Dundy, Hitchcock | 57 min |
| Jul 10, 8:33 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 31 min |
| Jul 10, 8:37 PM CDT | Severe Thunderstorm Warning | GLD | Hitchcock, Red Willow | 53 min |
| Jul 10, 8:44 PM CDT | Severe Thunderstorm Warning | LBF | Frontier, Hayes | 46 min |
| Jul 10, 8:51 PM CDT | Severe Thunderstorm Warning | GID | Furnas, Gosper, Harlan, Phelps | 39 min |
| Jul 10, 8:52 PM CDT | Severe Thunderstorm Warning | LBF | Chase, Hayes | 38 min |
| Jul 10, 9:00 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 60 min |
| Jul 10, 9:26 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Franklin, Gosper, Harlan, Kearney, Phelps | 49 min |
| Jul 10, 9:26 PM CDT | Severe Thunderstorm Warning | LBF | Frontier, Lincoln | 49 min |
| Jul 10, 9:31 PM CDT | Severe Thunderstorm Warning | LBF | Chase, Hayes, Lincoln, Perkins | 44 min |
| Jul 10, 9:34 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson, Gosper | 41 min |
| Jul 10, 9:55 PM CDT | Severe Thunderstorm Warning | GID | Buffalo | 20 min |
| Jul 10, 9:58 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 62 min |
| Jul 10, 10:02 PM CDT | Severe Thunderstorm Warning | LBF | Lincoln | 43 min |
| Jul 10, 10:11 PM CDT | Severe Thunderstorm Warning | GID | Adams, Buffalo, Dawson, Hall, Howard, Kearney and 1 more | 34 min |
| Jul 10, 10:38 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Greeley, Hall, Hamilton, Howard, Merrick and 3 more | 37 min |
| Jul 10, 11:00 PM CDT | Severe Thunderstorm Warning | GID | Greeley, Nance, Valley | 30 min |
| Jul 10, 11:07 PM CDT | Severe Thunderstorm Warning | GID | Hamilton, Merrick, Nance, Polk, York | 23 min |
| Jul 10, 11:07 PM CDT | Severe Thunderstorm Warning | LBF | Garfield, Wheeler | 38 min |
| Jul 10, 11:28 PM CDT | Severe Thunderstorm Warning | GID | Greeley, Hamilton, Merrick, Nance, Polk, Valley and 1 more | 32 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.4 hours before the alert went out and 20 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
- 2656 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1844 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 7.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:21 PM CDT | Mesoscale Discussion | SPC | Adams, Blaine, Brown, Buffalo, Chase, Custer and 29 more | 84 min |
| Jul 10, 10:27 PM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Buffalo, Burt, Butler, Cedar and 27 more | 63 min |
| Jul 10, 10:57 PM CDT | Severe Thunderstorm Watch | SPC | Antelope, Boone, Burt, Butler, Cedar, Colfax and 14 more | 4 hr |
| Jul 10, 11:56 PM CDT | Severe Thunderstorm Watch | SPC | Dakota, Dixon | 4 hr |
| Jul 11, 2:50 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 8 more | 85 min |
| Jul 11, 3:07 PM CDT | Severe Thunderstorm Watch | SPC | Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more | 7 hr |
| Jul 11, 5:01 PM CDT | Mesoscale Discussion | SPC | Cherry, Dawes, Sheridan | 29 min |
| Jul 11, 5:06 PM CDT | Tornado Watch | SPC | Box Butte, Cherry, Dawes, Sheridan, Sioux | 5 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2011Severe Thunderstorm Watches in Kansas, 2011Every severe thunderstorm watch in 2011
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.