Alert archive / Nebraska / Tornado Watches in 2007

Tornado Watch 232

May 5, 200727 counties in Kansas; 40 counties in Nebraska

The Storm Prediction Center issued this tornado watch at May 5, 2007, 9:51 AM CDT for 27 counties in Kansas; 40 counties in Nebraska. It was in force for 12 hr.

The area

The outline as issued.

The facts

Issued
May 5, 2007, 9:51 AM CDT (14:51 UTC)
Expired
May 5, 2007, 10:00 PM CDT
In force
12 hr
Issued by
the Storm Prediction Center
Particularly dangerous situation
Yes
Largest hail expected
4 in
Strongest gust expected
80 kt
All 67 counties

Barton County, KS, Cheyenne County, KS, Decatur County, KS, Ellis County, KS, Ellsworth County, KS, Gove County, KS, Graham County, KS, Jewell County, KS, Lane County, KS, Lincoln County, KS, Logan County, KS, Mitchell County, KS, Ness County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rawlins County, KS, Rice County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Thomas County, KS, Trego County, KS, Adams County, NE, Blaine County, NE, Boone 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, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith 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, Sherman County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE

The radar

The Grand Island radar (KUEX), 150 km from the middle of the area, began a volume at 14:51 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
95%
One or more EF2 to EF5 tornadoes
95%
Ten or more severe wind reports
90%
One or more gusts of 65 knots or more
80%
Ten or more severe hail reports
90%
One or more hailstones of 2 inches or more
80%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

61 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 5, 10:32 AM CDTSevere Thunderstorm WarningLBFLincoln58 min
May 5, 10:35 AM CDTSevere Thunderstorm WarningLBFCuster55 min
May 5, 10:56 AM CDTSevere Thunderstorm WarningLBFBlaine49 min
May 5, 11:26 AM CDTSevere Thunderstorm WarningGIDNance23 min
May 5, 11:42 AM CDTSevere Thunderstorm WarningGIDGreeley33 min
May 5, 11:49 AM CDTSevere Thunderstorm WarningOAXBoone, Madison41 min
May 5, 12:10 PM CDTSevere Thunderstorm WarningGIDDawson16 min
May 5, 12:18 PM CDTSevere Thunderstorm WarningLBFCuster, Lincoln42 min
May 5, 12:24 PM CDTTornado WarningLBFCuster51 min
May 5, 12:46 PM CDTSevere Thunderstorm WarningDDCNess, Trego44 min
May 5, 1:00 PM CDTSevere Thunderstorm WarningLBFThomas30 min
May 5, 1:01 PM CDTSevere Thunderstorm WarningDDCHodgeman, Ness, Trego44 min
May 5, 1:15 PM CDTTornado WarningLBFBlaine, Custer45 min
May 5, 1:37 PM CDTSevere Thunderstorm WarningDDCEllis38 min
May 5, 1:44 PM CDTSevere Thunderstorm WarningLBFCuster, Lincoln, Logan61 min
May 5, 1:57 PM CDTTornado WarningLBFBlaine, Brown63 min
May 5, 1:58 PM CDTSevere Thunderstorm WarningDDCHodgeman, Ness, Pawnee, Rush31 min
May 5, 2:10 PM CDTSevere Thunderstorm WarningDDCRush35 min
May 5, 2:11 PM CDTSevere Thunderstorm WarningICTBarton, Russell52 min
May 5, 2:12 PM CDTSevere Thunderstorm WarningDDCEllis33 min
May 5, 2:16 PM CDTSevere Thunderstorm WarningLBFBlaine, Thomas29 min
May 5, 2:22 PM CDTSevere Thunderstorm WarningGIDClay, Hamilton38 min
May 5, 2:22 PM CDTSevere Thunderstorm WarningLBFPerkins53 min
May 5, 2:25 PM CDTTornado WarningLBFPerkins30 min
May 5, 2:27 PM CDTSevere Thunderstorm WarningGIDDawson14 min
May 5, 2:32 PM CDTSevere Thunderstorm WarningOAXBoone28 min
May 5, 2:36 PM CDTTornado WarningLBFCuster34 min
May 5, 2:44 PM CDTSevere Thunderstorm WarningGIDOsborne31 min
May 5, 2:45 PM CDTTornado WarningLBFBlaine, Brown60 min
May 5, 2:51 PM CDTSevere Thunderstorm WarningLBFKeith39 min
May 5, 3:13 PM CDTSevere Thunderstorm WarningDDCPawnee, Rush47 min
May 5, 3:13 PM CDTSevere Thunderstorm WarningLBFBlaine, Custer37 min
May 5, 3:13 PM CDTTornado WarningLBFKeith18 min
May 5, 3:20 PM CDTSevere Thunderstorm WarningGIDClay, Nuckolls40 min
May 5, 3:45 PM CDTSevere Thunderstorm WarningOAXBoone30 min
May 5, 4:09 PM CDTSevere Thunderstorm WarningGIDFranklin, Webster29 min
May 5, 4:30 PM CDTFlash Flood WarningLBFBlaine, Brown, Custer, Keya Paha3 hr
May 5, 4:30 PM CDTTornado WarningLBFHolt, Loup, Rock45 min
May 5, 4:37 PM CDTSevere Thunderstorm WarningGIDPolk, York53 min
May 5, 5:09 PM CDTSevere Thunderstorm WarningLBFBlaine, Custer51 min
May 5, 5:46 PM CDTSevere Thunderstorm WarningICTBarton, Reno, Rice29 min
May 5, 5:54 PM CDTTornado WarningGIDOsborne, Smith37 min
May 5, 6:01 PM CDTTornado WarningICTBarton, Rice44 min
May 5, 6:33 PM CDTTornado Warning EmergencyICTBarton42 min
May 5, 6:54 PM CDTFlash Flood WarningICTBarton9 hr
May 5, 7:12 PM CDTTornado WarningICTBarton, Ellsworth, Russell48 min
May 5, 7:41 PM CDTFlash Flood WarningICTLincoln, Russell9 hr
May 5, 7:59 PM CDTTornado WarningICTBarton, Ellsworth, Lincoln, Russell46 min
May 5, 8:35 PM CDTTornado WarningICTBarton40 min
May 5, 8:36 PM CDTTornado WarningGIDMitchell54 min
May 5, 8:44 PM CDTTornado WarningICTLincoln22 min
May 5, 9:04 PM CDTTornado WarningGIDMitchell41 min
May 5, 9:10 PM CDTSevere Thunderstorm WarningGIDGreeley, Howard50 min
May 5, 9:12 PM CDTTornado WarningICTBarton, Ellsworth, Rice33 min
May 5, 9:22 PM CDTTornado WarningGIDGreeley38 min
May 5, 9:32 PM CDTTornado WarningGIDMitchell26 min
May 5, 9:36 PM CDTSevere Thunderstorm WarningGIDJewell38 min
May 5, 9:42 PM CDTTornado WarningICTBarton, Ellsworth, Rice, Russell48 min
May 5, 9:42 PM CDTSevere Thunderstorm WarningOAXBoone33 min
May 5, 9:44 PM CDTFlash Flood WarningICTEllsworth6 hr
May 5, 9:49 PM CDTTornado WarningICTBarton41 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 12:00Z, 2.9 hours before the alert went out and 74 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.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 2007-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 175 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 2007-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
175 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
820 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
199 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000
WWUS20 KWNS 051458
SEL2  
SPC WW 051458
KSZ000-NEZ000-060300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 232
NWS STORM PREDICTION CENTER NORMAN OK
955 AM CDT SAT MAY 5 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       PARTS OF WESTERN AND CENTRAL KANSAS
       PARTS OF SOUTHWEST AND CENTRAL NEBRASKA

EFFECTIVE THIS SATURDAY MORNING AND EVENING FROM 955 AM UNTIL
1000 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 90 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHWEST OF
BROKEN BOW NEBRASKA TO 55 MILES SOUTHWEST OF RUSSELL KANSAS.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).

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.

DISCUSSION...VERY POTENT TORNADIC SUPERCELL PATTERN IN PLACE ACROSS
WATCH AREA AS AIR MASS IS EXTREMELY UNSTABLE WITH VERY FAVORABLE
SHEAR PROFILES.  WITH LITTLE INHIBITION REMAINING ALONG E OF DRY
LINE...STORMS WILL RAPIDLY BECOME SEVERE BY EARLY THIS AFTERNOON WRN
KS INTO SWRN NEB.  TORNADIC SUPERCELLS WILL DEVELOP WITH POTENTIAL
FOR LONG TRACK/VIOLENT TORNADOS.  AS DRY LINE REMAINS WRN KS THRU
THE AFTERNOON...ADDITIONAL DEVELOPMENT OF TORNADIC SUPERCELLS ARE
LIKELY  OFF THE DRY LINE THRU THE EVENING HOURS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 80 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
600. MEAN STORM MOTION VECTOR 22040.


...HALES

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 4, 7:26 PM CDTTornado WatchSPCDecatur, Gove, Graham, Jewell, Mitchell, Norton and 5 more7 hr
May 4, 8:06 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Ford and 6 more84 min
May 4, 8:29 PM CDTMesoscale DiscussionSPCCheyenne, Sherman91 min
May 4, 9:41 PM CDTMesoscale DiscussionSPCDecatur, Graham, Norton, Osborne, Phillips, Rooks and 2 more94 min
May 4, 10:34 PM CDTMesoscale DiscussionSPCClay, Dickinson, Geary, Marion, Marshall, Morris and 2 more56 min
May 4, 11:10 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Ellsworth and 12 more95 min
May 4, 11:28 PM CDTMesoscale DiscussionSPCCheyenne, Sherman, Wallace92 min
May 5, 1:23 AM CDTMesoscale DiscussionSPCBarton, Clay, Cloud, Decatur, Ellis, Ellsworth and 15 more67 min
May 5, 1:30 AM CDTTornado WatchSPCClay, Cloud, Dickinson, Ellsworth, Jewell, Lincoln and 10 more7 hr
May 5, 3:00 AM CDTMesoscale DiscussionSPCBarton, Clay, Cloud, Dickinson, Ellsworth, Jewell and 12 more90 min
May 5, 6:59 AM CDTMesoscale DiscussionSPCRepublic, Washington61 min
May 5, 8:52 AM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Decatur and 40 more53 min
May 5, 11:32 AM CDTMesoscale DiscussionSPCNorton, Phillips, Smith88 min
May 5, 11:57 AM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Harper, Kingman and 3 more93 min
May 5, 12:15 PM CDTTornado Watch PDSSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 16 more10 hr
May 5, 2:32 PM CDTMesoscale DiscussionSPCClay, Cloud, Dickinson, Geary, Marshall, Morris and 5 more28 min
May 5, 2:42 PM CDTTornado Watch PDSSPCBrown, Chase, Clay, Cloud, Dickinson, Geary and 15 more7 hr
May 5, 3:26 PM CDTMesoscale DiscussionSPCBarton, Clark, Comanche, Edwards, Ellis, Ford and 14 more94 min
May 5, 6:16 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 14 more59 min
May 4, 8:49 PM CDTMesoscale DiscussionSPCAntelope, Cedar, Dixon, Knox, Madison, Pierce and 1 more56 min
May 4, 9:22 PM CDTTornado WatchSPCAntelope, Boone, Cedar, Knox, Pierce11 hr
May 5, 10:35 AM CDTMesoscale DiscussionSPCAntelope, Boyd, Brown, Burt, Cedar, Cherry and 13 more85 min
May 5, 10:55 AM CDTTornado WatchSPCAntelope, Boyd, Brown, Cedar, Dakota, Dixon and 7 more6 hr
May 5, 1:01 PM CDTMesoscale DiscussionSPCBoyd, Cedar, Dakota, Dixon, Holt, Knox and 2 more89 min
May 5, 1:45 PM CDTMesoscale DiscussionSPCArthur, Box Butte, Cherry, Dawes, Deuel, Garden and 8 more2 hr
May 5, 4:09 PM CDTMesoscale DiscussionSPCBoyd, Cedar, Dakota, Dixon, Holt, Keya Paha and 4 more96 min
May 5, 4:33 PM CDTTornado Watch PDSSPCAntelope, Boyd, Brown, Cedar, Cherry, Dakota and 8 more6 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.