Alert archive / Kansas / Tornado Watches in 2002

Tornado Watch 282

May 11, 200235 counties in Kansas; 8 counties in Nebraska

The Storm Prediction Center issued this tornado watch at May 11, 2002, 2:30 PM CDT for 35 counties in Kansas; 8 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2002, 2:30 PM CDT (19:30 UTC)
Expired
May 11, 2002, 8:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 43 counties

Barber County, KS, Barton County, KS, Clark County, KS, Clay County, KS, Cloud County, KS, Comanche County, KS, Dickinson County, KS, Edwards County, KS, Ellsworth County, KS, Geary County, KS, Harper County, KS, Harvey County, KS, Jewell County, KS, Kingman County, KS, Kiowa County, KS, Lincoln County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pawnee County, KS, Pottawatomie County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Stafford County, KS, Washington County, KS, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Nuckolls County, NE, Pawnee County, NE, Richardson County, NE, Thayer County, NE

The radar

The Wichita radar (KICT), 110 km from the middle of the area, began a volume at 19:33 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 11, 3:00 PM CDTSevere Thunderstorm WarningICTLincoln60 min
May 11, 3:17 PM CDTSevere Thunderstorm WarningGIDMitchell58 min
May 11, 3:35 PM CDTSevere Thunderstorm WarningOAXJefferson55 min
May 11, 3:55 PM CDTSevere Thunderstorm WarningICTLincoln65 min
May 11, 3:56 PM CDTSevere Thunderstorm WarningICTBarton64 min
May 11, 4:01 PM CDTTornado WarningOAXJefferson29 min
May 11, 4:04 PM CDTTornado WarningICTBarton41 min
May 11, 4:13 PM CDTSevere Thunderstorm WarningOAXGage62 min
May 11, 4:15 PM CDTSevere Thunderstorm WarningDDCEdwards, Pawnee45 min
May 11, 4:24 PM CDTTornado WarningDDCEdwards, Pawnee36 min
May 11, 4:24 PM CDTSevere Thunderstorm WarningICTEllsworth66 min
May 11, 4:27 PM CDTTornado WarningICTLincoln33 min
May 11, 4:29 PM CDTTornado WarningICTEllsworth46 min
May 11, 4:36 PM CDTTornado WarningICTRice39 min
May 11, 4:52 PM CDTTornado WarningICTSaline38 min
May 11, 5:01 PM CDTTornado WarningDDCEdwards, Pawnee29 min
May 11, 5:09 PM CDTSevere Thunderstorm WarningDDCStafford51 min
May 11, 5:13 PM CDTSevere Thunderstorm WarningDDCEdwards47 min
May 11, 5:15 PM CDTSevere Thunderstorm WarningICTEllsworth60 min
May 11, 5:21 PM CDTSevere Thunderstorm WarningOAXPawnee24 min
May 11, 5:29 PM CDTSevere Thunderstorm WarningDDCKiowa46 min
May 11, 5:50 PM CDTSevere Thunderstorm WarningDDCClark, Meade55 min
May 11, 5:57 PM CDTSevere Thunderstorm WarningDDCPratt, Stafford63 min
May 11, 6:00 PM CDTSevere Thunderstorm WarningDDCStafford30 min
May 11, 6:05 PM CDTSevere Thunderstorm WarningDDCClark, Meade40 min
May 11, 6:06 PM CDTTornado WarningDDCStafford24 min
May 11, 6:13 PM CDTTornado WarningDDCPratt32 min
May 11, 6:24 PM CDTSevere Thunderstorm WarningICTReno66 min
May 11, 6:26 PM CDTSevere Thunderstorm WarningOAXRichardson64 min
May 11, 6:38 PM CDTSevere Thunderstorm WarningDDCStafford37 min
May 11, 6:41 PM CDTSevere Thunderstorm WarningDDCStafford34 min
May 11, 6:41 PM CDTSevere Thunderstorm WarningDDCClark, Ford, Meade, Seward64 min
May 11, 6:47 PM CDTTornado WarningDDCPratt28 min
May 11, 6:47 PM CDTSevere Thunderstorm WarningICTRice58 min
May 11, 6:49 PM CDTSevere Thunderstorm WarningICTMcPherson56 min
May 11, 6:55 PM CDTSevere Thunderstorm WarningDDCEdwards, Kiowa65 min
May 11, 7:00 PM CDTTornado WarningICTKingman45 min
May 11, 7:24 PM CDTSevere Thunderstorm WarningDDCComanche51 min
May 11, 7:43 PM CDTTornado WarningICTKingman47 min
May 11, 7:44 PM CDTSevere Thunderstorm WarningICTReno61 min
May 11, 7:52 PM CDTSevere Thunderstorm WarningDDCClark53 min
May 11, 7:58 PM CDTSevere Thunderstorm WarningDDCBarber, Pratt47 min

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 7.5 hours before the alert went out and 163 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, Dodge City, at 12:00Z on 2002-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1296 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, Dodge City, at 12:00Z on 2002-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 494 square meters per square second.1939587897Sfc1 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
1296 J/kg
Mixed-layer CIN
-195 J/kg
Mixed-layer LCL
719 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
494 m²/s²
0-3 km storm-relative helicity
564 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.5

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 111907
SEL2  
SPC WW 111903
KSZ000-NEZ000-120100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 282
STORM PREDICTION CENTER NORMAN OK
203 PM CDT SAT MAY 11 2002

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

   CENTRAL AND NORTHEAST KANSAS                             
   SOUTHEAST NEBRASKA                           

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 230 PM UNTIL 800
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 25 MILES SOUTHWEST OF MEDICINE LODGE KANSAS TO 15
MILES NORTH NORTHEAST OF BEATRICE NEBRASKA.

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...AIR MASS AHEAD OF COLD FRONT FROM SCENTRAL NEB/KS
BORDER SWWD HAS BECOME VERY UNSTABLE WITH CAPES ABOVE 3000 J/KG.
WITH CAP WEAKENING...CONVERGENCE ALONG FRONT EXPECTED TO RAPIDLY
INITIATE SEVERE STORMS WITH DEEP LAYER SHEAR FAVORABLE FOR
SUPERCELLS. SUPERCELLS WILL ENHANCE THREAT FOR ISOLATED TORNADOES
AND LARGE HAIL.  


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 24030.


...HALES

402,0952 370,0974 370,1000 402,0975

WWUS20 KWNS 111907
SEL2  
SPC WW 111903
KSZ000-NEZ000-120100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 282
STORM PREDICTION CENTER NORMAN OK
203 PM CDT SAT MAY 11 2002

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

   CENTRAL AND NORTHEAST KANSAS                             
   SOUTHEAST NEBRASKA                           

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 230 PM UNTIL 800
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 25 MILES SOUTHWEST OF MEDICINE LODGE KANSAS TO 15
MILES NORTH NORTHEAST OF BEATRICE NEBRASKA.

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...AIR MASS AHEAD OF COLD FRONT FROM SCENTRAL NEB/KS
BORDER SWWD HAS BECOME VERY UNSTABLE WITH CAPES ABOVE 3000 J/KG.
WITH CAP WEAKENING...CONVERGENCE ALONG FRONT EXPECTED TO RAPIDLY
INITIATE SEVERE STORMS WITH DEEP LAYER SHEAR FAVORABLE FOR
SUPERCELLS. SUPERCELLS WILL ENHANCE THREAT FOR ISOLATED TORNADOES
AND LARGE HAIL.  


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 24030.


...HALES

402,0952 370,0974 370,1000 402,0975

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 1:00 AM CDTSevere Thunderstorm WatchSPCBarber, Clark, Comanche, Edwards, Ford, Gray and 11 more5 hr

Nearby

Tornado Watches in Kansas, 2002Tornado Watches in Nebraska, 2002Every tornado watch in 2002

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.