Alert archive / Kansas / Tornado Watches in 2005

Tornado Watch 259

May 12, 20054 states

The Storm Prediction Center issued this tornado watch at May 12, 2005, 1:55 PM CDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 12, 2005, 1:55 PM CDT (18:55 UTC)
Expired
May 12, 2005, 9:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
All 45 counties

Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Cass County, MO, Clay County, MO, Holt County, MO, Jackson County, MO, Nodaway County, MO, Platte County, MO, Butler County, NE, Cass County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE

The radar

The Omaha radar (KOAX), 126 km from the middle of the area, began a volume at 18:55 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 12, 2:05 PM CDTSevere Thunderstorm WarningTOPMarshall40 min
May 12, 2:44 PM CDTSevere Thunderstorm WarningTOPMarshall, Nemaha, Pottawatomie46 min
May 12, 2:50 PM CDTSevere Thunderstorm WarningOAXLancaster25 min
May 12, 3:01 PM CDTSevere Thunderstorm WarningOAXOtoe44 min
May 12, 3:14 PM CDTSevere Thunderstorm WarningOAXJohnson, Pawnee31 min
May 12, 3:22 PM CDTFlash Flood WarningTOPMarshall3 hr
May 12, 3:45 PM CDTSevere Thunderstorm WarningTOPRiley45 min
May 12, 3:50 PM CDTSevere Thunderstorm WarningTOPNemaha25 min
May 12, 3:58 PM CDTTornado WarningOAXOtoe35 min
May 12, 4:13 PM CDTSevere Thunderstorm WarningOAXRichardson47 min
May 12, 4:14 PM CDTSevere Thunderstorm WarningTOPNemaha61 min
May 12, 4:15 PM CDTSevere Thunderstorm WarningOAXFremont45 min
May 12, 4:24 PM CDTSevere Thunderstorm WarningOAXMontgomery, Pottawattamie37 min
May 12, 4:34 PM CDTFlash Flood WarningTOPNemaha3 hr
May 12, 4:34 PM CDTFlash Flood WarningOAXOtoe4 hr
May 12, 4:49 PM CDTSevere Thunderstorm WarningTOPShawnee, Wabaunsee26 min
May 12, 4:50 PM CDTFlash Flood WarningTOPPottawatomie3 hr
May 12, 4:57 PM CDTFlash Flood WarningOAXFremont, Mills, Montgomery, Page4 hr
May 12, 5:03 PM CDTSevere Thunderstorm WarningOAXRichardson27 min
May 12, 5:09 PM CDTSevere Thunderstorm WarningEAXHolt33 min
May 12, 5:34 PM CDTFlash Flood WarningOAXRichardson3 hr
May 12, 5:49 PM CDTSevere Thunderstorm WarningTOPBrown29 min
May 12, 6:10 PM CDTSevere Thunderstorm WarningTOPOsage, Shawnee40 min
May 12, 6:15 PM CDTSevere Thunderstorm WarningEAXAtchison, Doniphan46 min
May 12, 6:25 PM CDTSevere Thunderstorm WarningTOPDouglas50 min
May 12, 6:31 PM CDTSevere Thunderstorm WarningEAXAndrew, DeKalb, Gentry, Nodaway44 min
May 12, 6:36 PM CDTSevere Thunderstorm WarningTOPJefferson27 min
May 12, 6:40 PM CDTSevere Thunderstorm WarningEAXJohnson, Leavenworth, Wyandotte35 min
May 12, 6:42 PM CDTFlash Flood WarningEAXAtchison, Doniphan6 hr
May 12, 7:04 PM CDTSevere Thunderstorm WarningEAXClay, Jackson56 min
May 12, 7:13 PM CDTSevere Thunderstorm WarningEAXJohnson, Leavenworth, Wyandotte37 min
May 12, 7:14 PM CDTSevere Thunderstorm WarningEAXAndrew, DeKalb, Gentry23 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

Topeka, KS (KTOP), launched 12:00Z, 6.9 hours before the alert went out and 145 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, Topeka, KS at 12:00Z on 2005-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 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, Topeka, KS at 12:00Z on 2005-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 418 square meters per square second.193958Sfc1 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
47 J/kg
Mixed-layer CIN
-239 J/kg
Mixed-layer LCL
1153 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
418 m²/s²
0-3 km storm-relative helicity
395 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 121855
SEL9  
SPC WW 121855
IAZ000-KSZ000-MOZ000-NEZ000-130200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 259
NWS STORM PREDICTION CENTER NORMAN OK
155 PM CDT THU MAY 12 2005

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

       SOUTHWESTERN IOWA
       NORTHEASTERN KANSAS
       NORTHWESTERN MISSOURI
       SOUTHEASTERN NEBRASKA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 155 PM UNTIL
900 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES
EAST AND WEST OF A LINE FROM 25 MILES WEST NORTHWEST OF OMAHA
NEBRASKA TO 35 MILES SOUTH SOUTHEAST OF TOPEKA KANSAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU9).

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 257...WW 258...

DISCUSSION...CONVECTION BEGINNING TO DEVELOP ALONG OUTFLOW BOUNDARY
FROM YESTERDAYS CONVECTION...WEST OF LNK/BIE TO NORTHEAST OF MHK
EARLY THIS AFTERNOON.  AIR MASS EAST OF THIS LINE OVER NERN KS AND
NWRN MO HAS ALREADY BECOME MODERATELY UNSTABLE AND WEAKLY
CAPPED...WITH HEATING EXPECTED TO DESTABILIZE ATMOSPHERE FURTHER
INTO SERN NEB AND FAR SWRN IA. BACKED LOW LEVEL WINDS ACROSS WATCH
AREA WILL ENHANCE THE POTENTIAL FOR SUPERCELLS AND TORNADOES.  VERY
LARGE HAIL IS ALSO A CONCERN WITH SUPERCELLS AS THEY MOVE ENEWD
THROUGH THE EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24020.


...EVANS

412,0950 383,0940 383,0963 412,0973

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 12, 3:44 AM CDTMesoscale DiscussionSPCFremont61 min
May 12, 12:40 PM CDTMesoscale DiscussionSPCFremont, Page95 min
May 12, 3:48 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 27 more87 min
May 11, 8:01 PM CDTMesoscale DiscussionSPCCheyenne, Clark, Decatur, Finney, Ford, Gove and 24 more59 min
May 11, 9:26 PM CDTMesoscale DiscussionSPCDecatur, Ellis, Finney, Gove, Graham, Grant and 15 more64 min
May 11, 9:50 PM CDTTornado WatchSPCClark, Decatur, Edwards, Ellis, Finney, Ford and 28 more7 hr
May 11, 11:02 PM CDTMesoscale DiscussionSPCBrown, Marshall, Nemaha58 min
May 12, 1:16 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 21 more59 min
May 12, 1:35 PM CDTSevere Thunderstorm WatchSPCBarber, Barton, Clark, Clay, Cloud, Comanche and 29 more7 hr
May 12, 3:13 PM CDTMesoscale DiscussionSPCBarber, Barton, Clay, Cloud, Comanche, Dickinson and 28 more92 min
May 12, 5:18 PM CDTMesoscale DiscussionSPCBarber, Butler, Cowley, Harper, Harvey, Kingman and 2 more57 min
May 12, 5:55 PM CDTSevere Thunderstorm WatchSPCBarber, Butler, Chase, Coffey, Comanche, Cowley and 14 more7 hr
May 12, 6:37 PM CDTMesoscale DiscussionSPCCaldwell, Carroll, Chariton, Clay, Clinton, Cooper and 13 more83 min
May 12, 6:55 PM CDTSevere Thunderstorm WatchSPCAdair, Audrain, Boone, Caldwell, Callaway, Carroll and 32 more6 hr
May 11, 7:02 PM CDTMesoscale DiscussionSPCAdams, Arthur, Boone, Buffalo, Butler, Chase and 33 more88 min
May 11, 11:50 PM CDTSevere Thunderstorm WatchSPCAdams, Boone, Buffalo, Butler, Cass, Clay and 30 more5 hr

Nearby

Tornado Watches in Kansas, 2005Tornado Watches in Nebraska, 2005Tornado Watches in Missouri, 2005Every tornado watch in 2005

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.