Alert archive / Nebraska / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 696
The Storm Prediction Center issued this severe thunderstorm watch at Sep 29, 2007, 10:38 PM CDT for 6 counties in Kansas; 16 counties in Nebraska. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 29, 2007, 10:38 PM CDT (03:38 UTC)
- Expired
- Sep 30, 2007, 1:25 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 22 counties
Gove County, KS, Graham County, KS, Norton County, KS, Phillips County, KS, Rooks County, KS, Sheridan County, KS, Boyd County, NE, Buffalo County, NE, Dawson County, NE, Franklin County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Harlan County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Phelps County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE
The radar
The North Platte radar (KLNX), 113 km from the middle of the area, began a volume at 03:40 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
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 29, 10:42 PM CDT | Severe Thunderstorm Warning | GID | Furnas, Gosper | 33 min |
| Sep 29, 11:13 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson, Gosper, Phelps | 32 min |
| Sep 29, 11:29 PM CDT | Severe Thunderstorm Warning | GID | Furnas, Harlan | 31 min |
| Sep 29, 11:43 PM CDT | Severe Thunderstorm Warning | GID | Phelps | 32 min |
| Sep 30, 12:03 AM CDT | Severe Thunderstorm Warning | GID | Buffalo, Phelps | 27 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, 3.6 hours before the alert went out and 103 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
- 2348 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 1804 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 248 m²/s²
- 0-3 km storm-relative helicity
- 365 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 22.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 29, 9:31 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Greeley, Hamilton, Kearny, Logan and 8 more | 89 min |
| Sep 30, 12:10 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Butler and 37 more | 65 min |
| Sep 30, 12:37 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Butler and 35 more | 7 hr |
| Sep 30, 2:26 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Coffey, Cowley and 16 more | 64 min |
| Sep 30, 6:13 PM CDT | Mesoscale Discussion | SPC | Cherokee, Crawford, Labette | 92 min |
| Sep 30, 11:01 AM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Boone, Boyd, Buffalo, Butler and 32 more | 59 min |
| Sep 30, 1:02 PM CDT | Tornado Watch | SPC | Burt, Butler, Cass, Cedar, Clay, Colfax and 32 more | 7 hr |
| Sep 30, 3:36 PM CDT | Mesoscale Discussion | SPC | Burt, Cedar, Cuming, Dakota, Dixon, Thurston and 2 more | 54 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2007Severe Thunderstorm Watches in Kansas, 2007Every severe thunderstorm watch in 2007
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.