Alert archive / Nebraska / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 667
The Storm Prediction Center issued this severe thunderstorm watch at Sep 6, 2007, 4:48 PM CDT for 15 counties in Kansas; 26 counties in Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2007, 4:48 PM CDT (21:48 UTC)
- Expired
- Sep 6, 2007, 11:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 41 counties
Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Greeley County, KS, Logan County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Sherman County, NE, Valley County, NE
The radar
The North Platte radar (KLNX), 154 km from the middle of the area, began a volume at 21:47 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
- 5%
- 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
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 5:09 PM CDT | Severe Thunderstorm Warning | LBF | Keith | 36 min |
| Sep 6, 6:23 PM CDT | Severe Thunderstorm Warning | GLD | Wallace | 67 min |
| Sep 6, 6:55 PM CDT | Severe Thunderstorm Warning | LBF | Frontier | 37 min |
| Sep 6, 7:08 PM CDT | Severe Thunderstorm Warning | GID | Phelps | 52 min |
| Sep 6, 7:15 PM CDT | Severe Thunderstorm Warning | GLD | Logan | 27 min |
| Sep 6, 7:20 PM CDT | Severe Thunderstorm Warning | GLD | Gove | 33 min |
| Sep 6, 7:24 PM CDT | Severe Thunderstorm Warning | GID | Gosper | 51 min |
| Sep 6, 7:45 PM CDT | Severe Thunderstorm Warning | GID | Kearney | 45 min |
| Sep 6, 7:49 PM CDT | Severe Thunderstorm Warning | GID | Furnas, Harlan | 41 min |
| Sep 6, 8:02 PM CDT | Tornado Warning | GID | Harlan | 43 min |
| Sep 6, 8:08 PM CDT | Severe Thunderstorm Warning | GLD | Norton | 23 min |
| Sep 6, 8:09 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Hall | 51 min |
| Sep 6, 8:27 PM CDT | Severe Thunderstorm Warning | GID | Franklin | 48 min |
| Sep 6, 8:29 PM CDT | Severe Thunderstorm Warning | GID | Phillips | 46 min |
| Sep 6, 8:54 PM CDT | Severe Thunderstorm Warning | GID | Hall, Hamilton | 16 min |
| Sep 6, 9:14 PM CDT | Severe Thunderstorm Warning | GID | Franklin | 15 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
Denver, CO (KDNR), launched 12:00Z, 9.8 hours before the alert went out and 223 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1293 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 3:11 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Gove, Graham, Logan, Norton and 5 more | 94 min |
| Sep 6, 5:59 PM CDT | Mesoscale Discussion | SPC | Brown, Marshall, Nemaha | 91 min |
| Sep 6, 6:19 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 11 more | 7 hr |
| Sep 6, 5:23 PM CDT | Mesoscale Discussion | SPC | Cherry, Hooker, Keya Paha, Thomas | 97 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.