Alert archive / Nebraska / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 307
The Storm Prediction Center issued this severe thunderstorm watch at May 29, 2007, 8:22 PM CDT for 4 counties in Kansas; 8 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 29, 2007, 8:22 PM CDT (01:22 UTC)
- Expired
- May 30, 2007, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Osborne County, KS, Phillips County, KS, Rooks County, KS, Smith County, KS, Adams County, NE, Franklin County, NE, Furnas County, NE, Gosper County, NE, Harlan County, NE, Kearney County, NE, Phelps County, NE, Webster County, NE
The radar
The Grand Island radar (KUEX), 87 km from the middle of the area, began a volume at 01:23 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
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 8:37 PM CDT | Severe Thunderstorm Warning | GID | Furnas | 53 min |
| May 29, 9:03 PM CDT | Tornado Warning | GID | Furnas | 42 min |
| May 29, 9:15 PM CDT | Severe Thunderstorm Warning | GID | Gosper | 45 min |
| May 29, 9:33 PM CDT | Severe Thunderstorm Warning | GID | Phillips | 57 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
Dodge City, (KDDC), launched 00:00Z, 1.4 hours before the alert went out and 255 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
- 1362 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 1343 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 7:08 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Clark, Comanche, Edwards, Ellis, Finney and 30 more | 7 hr |
| May 29, 9:02 PM CDT | Mesoscale Discussion | SPC | Clark, Comanche, Edwards, Ellis, Finney, Ford and 27 more | 118 min |
| May 29, 10:43 PM CDT | Mesoscale Discussion | SPC | Barton, Clark, Clay, Cloud, Comanche, Dickinson and 32 more | 92 min |
| May 29, 11:03 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Ellsworth, Harper, Kingman, Lincoln, McPherson and 4 more | 4 hr |
| May 30, 1:52 AM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Harper, Kingman, Kiowa, Pratt and 3 more | 83 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.