Alert archive / Kansas / Tornado Watches in 2005

Tornado Watch 151

April 11, 20054 states

The Storm Prediction Center issued this tornado watch at Apr 11, 2005, 11:55 AM CDT for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Apr 11, 2005, 11:55 AM CDT (16:55 UTC)
Expired
Apr 11, 2005, 8:00 PM CDT
In force
8 hr
Issued by
the Storm Prediction Center
All 52 counties

Audubon County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Brown County, KS, Chase County, KS, Clay County, KS, Dickinson County, KS, Geary County, KS, Jackson County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Riley County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Atchison County, MO, Holt County, MO, Burt County, NE, Cass County, NE, Dodge 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, Thurston County, NE, Washington County, NE

The radar

The Topeka radar (KTWX), 99 km from the middle of the area, began a volume at 16:57 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

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

IssuedProductOfficeCountiesLasted
Apr 11, 1:47 PM CDTSevere Thunderstorm WarningOAXLancaster28 min
Apr 11, 1:59 PM CDTSevere Thunderstorm WarningOAXJefferson, Saline46 min
Apr 11, 2:14 PM CDTSevere Thunderstorm WarningOAXLancaster46 min
Apr 11, 2:39 PM CDTTornado WarningOAXSaline, Seward36 min
Apr 11, 2:46 PM CDTTornado WarningOAXLancaster44 min
Apr 11, 2:48 PM CDTSevere Thunderstorm WarningTOPWashington42 min
Apr 11, 3:12 PM CDTSevere Thunderstorm WarningOAXSaunders48 min
Apr 11, 3:15 PM CDTSevere Thunderstorm WarningOAXLancaster, Seward45 min
Apr 11, 3:29 PM CDTSevere Thunderstorm WarningTOPWashington49 min
Apr 11, 3:56 PM CDTSevere Thunderstorm WarningOAXDouglas49 min
Apr 11, 4:09 PM CDTSevere Thunderstorm WarningOAXSarpy37 min
Apr 11, 4:11 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson49 min
Apr 11, 4:18 PM CDTSevere Thunderstorm WarningOAXGage42 min
Apr 11, 4:33 PM CDTSevere Thunderstorm WarningTOPPottawatomie27 min
Apr 11, 4:41 PM CDTSevere Thunderstorm WarningOAXCass34 min
Apr 11, 4:56 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Riley64 min
Apr 11, 5:09 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson70 min
Apr 11, 5:28 PM CDTSevere Thunderstorm WarningTOPRiley, Washington47 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, 4.9 hours before the alert went out and 124 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 2005-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 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 2005-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.1939587897117Sfc1 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
19 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
1068 m above ground
0-6 km bulk shear
82 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 111659
SEL1  
SPC WW 111659
IAZ000-KSZ000-MOZ000-NEZ000-120100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 151
NWS STORM PREDICTION CENTER NORMAN OK
1155 AM CDT MON APR 11 2005

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

       WESTERN IOWA
       NORTHEAST KANSAS
       FAR NORTHWEST MISSOURI
       SOUTHEAST NEBRASKA

EFFECTIVE THIS MONDAY MORNING AND EVENING FROM 1155 AM UNTIL 800
PM CDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES
EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHEAST OF OMAHA
NEBRASKA TO 50 MILES SOUTHEAST OF SALINA 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 150...

DISCUSSION...THUNDERSTORMS EXPECTED TO DEVELOP IN THE NEXT HOUR OR
SO OVER NE KS/SE NEB IN NE QUADRANT OF SURFACE LOW W OF MHK.  DEEP
SHEAR WILL SLOWLY DECREASE FROM W TO E LATER TODAY AS WRN KS UPPER
LOW CONTINUES EWD...BUT SHOULD REMAIN SUFFICIENT FOR SUPERCELLS. 
LOW LEVEL TURNING NEAR SURFACE LOW...CONTINUED LOW LEVEL MOISTURE
INFLUX AND SURFACE HEATING WILL PROMOTE POTENTIAL FOR LARGE HAIL AND
POSSIBLE TORNADOES FROM ANY STORMS THAT DO FORM.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
400. MEAN STORM MOTION VECTOR 21030.


...CORFIDI

420,0941 381,0955 381,0980 420,0963

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 10, 7:49 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 36 more56 min
Apr 11, 10:55 AM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 18 more95 min
Apr 11, 5:01 PM CDTMesoscale DiscussionSPCAudubon, Carroll, Cass, Crawford, Fremont, Greene and 8 more59 min
Apr 10, 8:53 PM CDTMesoscale DiscussionSPCCherokee, Crawford, Labette, Montgomery2 hr
Apr 10, 9:23 PM CDTMesoscale DiscussionSPCButler, Clay, Cloud, Cowley, Dickinson, Ellsworth and 14 more2 hr
Apr 11, 2:01 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Cherokee, Coffey, Crawford and 10 more89 min
Apr 11, 5:40 PM CDTSevere Thunderstorm WatchSPCDoniphan, Johnson, Leavenworth, Linn, Miami, Wyandotte4 hr
Apr 10, 9:15 PM CDTSevere Thunderstorm WatchSPCBarry, Lawrence, McDonald, Newton, Stone7 hr
Apr 11, 1:23 AM CDTMesoscale DiscussionSPCBarry, McDonald, Newton, Stone67 min
Apr 11, 6:17 AM CDTMesoscale DiscussionSPCButler, Dunklin, Mississippi, New Madrid, Oregon, Pemiscot and 3 more118 min

Nearby

Tornado Watches in Kansas, 2005Tornado Watches in Nebraska, 2005Tornado Watches in Iowa, 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.