

326 

WWUS20 KWNS 091941

SEL8

SPC WW 091941

KSZ000-OKZ000-100300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 358

NWS STORM PREDICTION CENTER NORMAN OK

235 PM CDT TUE JUN 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTH CENTRAL AND SOUTHEAST KANSAS

       EXTREME NORTH CENTRAL AND NORTHEAST OKLAHOMA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

1000 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 55 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 65 MILES WEST NORTHWEST OF

MEDICINE LODGE KANSAS TO 40 MILES SOUTHEAST OF CHANUTE KANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 354...WW 355...WW

356...WW 357...



DISCUSSION...AN OUTFLOW BOUNDARY FROM ONGOING STORMS IN SE KS/SW MO

IS DRIFTING SWD ACROSS SRN KS...AND THE WRN PORTION OF THE BOUNDARY

WILL STALL THIS AFTERNOON NEAR ICT...WITH STORM DEVELOPMENT EXPECTED

IN THE NEXT 1-2 HOURS.  MEANWHILE...LOW-LEVEL WINDS HAVE VEERED AND

LOW-LEVEL SHEAR HAS WEAKENED A LITTLE ACROSS NRN OK/SRN KS...WITH

SOMEWHAT STRONGER LOW-LEVEL SHEAR FARTHER E TOWARD SE KS.  SHORT

TERM MODEL FORECASTS ARE UNCLEAR ON THE EXTENT TO WHICH LOW-LEVEL

FLOW WILL RESPOND TO A MID LEVEL SPEED MAX EJECTING ENEWD OVER THE

TX PANHANDLE.  ALSO...THE COLD POOL IS STILL RELATIVELY NEW AND MAY

NOT HAVE SUFFICIENT TIME TO MODIFY BEFORE NEW STORMS FORM ALONG THE

BOUNDARY...WHICH CASTS SOME DOUBT ON THE THREAT FOR

LONG-LIVED/INTENSE TORNADOES.  REGARDLESS...THE STORM ENVIRONMENT

WILL STILL FAVOR SUPERCELLS WITH VERY LARGE HAIL AND THE POTENTIAL

FOR A FEW TORNADOES THROUGH THIS EVENING...GIVEN MLCAPE AOA 3000

J/KG AND EFFECTIVE BULK SHEAR AOA 50 KT.



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

600. MEAN STORM MOTION VECTOR 28025.





...THOMPSON

