Alert archive / Nebraska / Tornado Watches in 2007
Tornado Watch 231
The Storm Prediction Center issued this tornado watch at May 5, 2007, 1:30 AM CDT for 16 counties in Kansas; 66 counties in Nebraska. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 5, 2007, 1:30 AM CDT (06:30 UTC)
- Expired
- May 5, 2007, 8:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 70 kt
All 82 counties
Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellsworth County, KS, Jewell County, KS, Lincoln County, KS, Mitchell County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Republic County, KS, Rooks County, KS, Russell County, KS, Saline County, KS, Smith County, KS, Washington County, KS, Adams County, NE, Antelope County, NE, Arthur County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Butler County, NE, Cedar County, NE, Chase County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dawson County, NE, Dodge County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Keith County, NE, Keya Paha County, NE, Knox County, NE, Lancaster County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Pawnee County, NE, Perkins County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thomas County, NE, Valley County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE
The radar
The North Platte radar (KLNX), 121 km from the middle of the area, began a volume at 06:33 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
- 70%
- One or more EF2 to EF5 tornadoes
- 50%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 1:32 AM CDT | Severe Thunderstorm Warning | GID | Phillips | 36 min |
| May 5, 1:33 AM CDT | Severe Thunderstorm Warning | LBF | Chase | 27 min |
| May 5, 1:36 AM CDT | Severe Thunderstorm Warning | GID | Clay, Hamilton, York | 54 min |
| May 5, 1:46 AM CDT | Severe Thunderstorm Warning | GID | Harlan | 59 min |
| May 5, 1:46 AM CDT | Severe Thunderstorm Warning | LBF | Wheeler | 28 min |
| May 5, 1:48 AM CDT | Severe Thunderstorm Warning | GID | Jewell, Smith | 57 min |
| May 5, 1:49 AM CDT | Tornado Warning | ICT | Barton, Ellsworth, Rice | 56 min |
| May 5, 1:54 AM CDT | Severe Thunderstorm Warning | OAX | Pawnee | 18 min |
| May 5, 1:55 AM CDT | Flash Flood Warning | LBF | Lincoln | 95 min |
| May 5, 1:57 AM CDT | Severe Thunderstorm Warning | LBF | Blaine, Custer | 63 min |
| May 5, 2:01 AM CDT | Severe Thunderstorm Warning | LBF | Keith, Lincoln, Perkins | 44 min |
| May 5, 2:03 AM CDT | Tornado Warning | ICT | Ellsworth, Rice | 42 min |
| May 5, 2:22 AM CDT | Severe Thunderstorm Warning | GID | Franklin, Kearney | 30 min |
| May 5, 2:27 AM CDT | Severe Thunderstorm Warning | TOP | Cloud | 63 min |
| May 5, 2:41 AM CDT | Severe Thunderstorm Warning | ICT | Ellsworth, Lincoln, McPherson, Rice, Saline | 64 min |
| May 5, 2:46 AM CDT | Severe Thunderstorm Warning | OAX | Butler, Platte | 44 min |
| May 5, 3:20 AM CDT | Severe Thunderstorm Warning | ICT | Saline | 55 min |
| May 5, 3:25 AM CDT | Flash Flood Warning | LBF | Lincoln | 95 min |
| May 5, 3:26 AM CDT | Tornado Warning | TOP | Republic, Washington | 49 min |
| May 5, 3:35 AM CDT | Severe Thunderstorm Warning | LBF | Custer | 40 min |
| May 5, 4:22 AM CDT | Severe Thunderstorm Warning | GID | Jewell | 38 min |
| May 5, 4:29 AM CDT | Severe Thunderstorm Warning | GID | Smith | 61 min |
| May 5, 4:33 AM CDT | Flash Flood Warning | GID | Franklin | 6 hr |
| May 5, 5:56 AM CDT | Severe Thunderstorm Warning | OAX | Gage | 34 min |
| May 5, 6:02 AM CDT | Flash Flood Warning | LBF | Custer | 3 hr |
| May 5, 7:30 AM CDT | Severe Thunderstorm Warning | GID | Buffalo | 30 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, 6.5 hours before the alert went out and 92 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
- 1008 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 699 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 050632
SEL1
SPC WW 050632
KSZ000-NEZ000-051300-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 231
NWS STORM PREDICTION CENTER NORMAN OK
130 AM CDT SAT MAY 5 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTH CENTRAL KANSAS
MUCH OF NEBRASKA
EFFECTIVE THIS SATURDAY MORNING FROM 130 AM UNTIL 800 AM CDT.
TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF
AINSWORTH NEBRASKA TO 30 MILES EAST SOUTHEAST OF RUSSELL KANSAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 228...WW 230...
DISCUSSION...NUMEROUS STRONG/SEVERE THUNDERSTORMS CONTINUE THIS
MORNING ACROSS PARTS OF NEB AND CENTRAL KS...INCLUDING A LONG-LIVED
TORNADIC SUPERCELL NEAR GBD. THIS ACTIVITY WILL LIKELY PERSIST FOR
MUCH OF THE NIGHT AS IT TRACKS NORTHEASTWARD THROUGH A MOIST...
UNSTABLE...AND STRONGLY SHEARED ENVIRONMENT. SUPERCELLS CAPABLE OF
LARGE HAIL...DAMAGING WINDS...AND TORNADOES ARE POSSIBLE.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 22030.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:26 PM CDT | Tornado Watch | SPC | Decatur, Gove, Graham, Jewell, Mitchell, Norton and 5 more | 7 hr |
| May 4, 8:06 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ford and 6 more | 84 min |
| May 4, 8:29 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Sherman | 91 min |
| May 4, 9:41 PM CDT | Mesoscale Discussion | SPC | Decatur, Graham, Norton, Osborne, Phillips, Rooks and 2 more | 94 min |
| May 4, 10:34 PM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Geary, Marion, Marshall, Morris and 2 more | 56 min |
| May 4, 11:10 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ellsworth and 12 more | 95 min |
| May 4, 11:28 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Sherman, Wallace | 92 min |
| May 5, 1:23 AM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Decatur, Ellis, Ellsworth and 15 more | 67 min |
| May 5, 3:00 AM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Dickinson, Ellsworth, Jewell and 12 more | 90 min |
| May 5, 6:59 AM CDT | Mesoscale Discussion | SPC | Republic, Washington | 61 min |
| May 5, 8:52 AM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Cloud, Comanche, Decatur and 40 more | 53 min |
| May 5, 9:51 AM CDT | Tornado Watch | SPC | Barton, Cheyenne, Decatur, Ellis, Ellsworth, Gove and 21 more | 12 hr |
| May 5, 11:32 AM CDT | Mesoscale Discussion | SPC | Norton, Phillips, Smith | 88 min |
| May 5, 11:57 AM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Edwards, Harper, Kingman and 3 more | 93 min |
| May 5, 12:15 PM CDT | Tornado Watch | SPC | Barber, Clark, Comanche, Edwards, Finney, Ford and 16 more | 10 hr |
| May 5, 2:32 PM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Dickinson, Geary, Marshall, Morris and 5 more | 28 min |
| May 5, 2:42 PM CDT | Tornado Watch | SPC | Brown, Chase, Clay, Cloud, Dickinson, Geary and 15 more | 7 hr |
| May 5, 3:26 PM CDT | Mesoscale Discussion | SPC | Barton, Clark, Comanche, Edwards, Ellis, Ford and 14 more | 94 min |
| May 5, 6:16 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Cloud, Comanche, Edwards and 14 more | 59 min |
| May 4, 8:49 PM CDT | Mesoscale Discussion | SPC | Antelope, Cedar, Dixon, Knox, Madison, Pierce and 1 more | 56 min |
| May 4, 9:22 PM CDT | Tornado Watch | SPC | Antelope, Boone, Cedar, Knox, Pierce | 11 hr |
| May 5, 10:35 AM CDT | Mesoscale Discussion | SPC | Antelope, Boyd, Brown, Burt, Cedar, Cherry and 13 more | 85 min |
| May 5, 10:55 AM CDT | Tornado Watch | SPC | Antelope, Boyd, Brown, Cedar, Dakota, Dixon and 7 more | 6 hr |
| May 5, 1:01 PM CDT | Mesoscale Discussion | SPC | Boyd, Cedar, Dakota, Dixon, Holt, Knox and 2 more | 89 min |
| May 5, 1:45 PM CDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Cherry, Dawes, Deuel, Garden and 8 more | 2 hr |
| May 5, 4:09 PM CDT | Mesoscale Discussion | SPC | Boyd, Cedar, Dakota, Dixon, Holt, Keya Paha and 4 more | 96 min |
| May 5, 4:33 PM CDT | Tornado Watch | SPC | Antelope, Boyd, Brown, Cedar, Cherry, Dakota and 8 more | 6 hr |
Nearby
Tornado Watches in Nebraska, 2007Tornado Watches in Kansas, 2007Every tornado 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.