

533 

WWUS20 KWNS 152006

SEL7

SPC WW 152006

KSZ000-OKZ000-TXZ000-160300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 307

NWS STORM PREDICTION CENTER NORMAN OK

305 PM CDT FRI MAY 15 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL INTO EASTERN KANSAS

       WESTERN INTO NORTHERN OKLAHOMA

       EASTERN TEXAS PANHANDLE



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 305 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 70 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 70 MILES SOUTHWEST OF GAGE

OKLAHOMA TO 50 MILES NORTH NORTHEAST OF CHANUTE KANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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 305...WW 306...



DISCUSSION...EXTREME INSTABILITY IN PLACE AHEAD OF APPROACHING

SURFACE COLD FRONT SHOULD SUPPORT RAPID SEVERE THUNDERSTORM

DEVELOPMENT DURING THE NEXT 1-2 HOURS...BOTH NEAR FRONT AND DRY LINE

OVER ERN TX PANHANDLE.  DEGREE OF INSTABILITY AND STRENGTH OF CAP

MAY SUPPORT DISCRETE DEVELOPMENT INTO THE EARLY EVENING...DESPITE

THE MODEST DEEP LAYER SHEAR.  SHOULD STORMS REMAIN DISCRETE...SLOW

SSEWD MOVING  SUPERCELLS SHOULD EVOLVE WITH ATTENDANT THREATS OF

VERY LARGE HAIL AND BRIEF TORNADOES.  SHEAR WILL REMAIN STRONGER

WITH POSSIBLY A GREATER TORNADO POTENTIAL INTO ERN KS.  OVERALL

EVOLUTION INTO A LARGER MCS...POSSIBLY COMPOSED OF SEVERAL

SMALL-SCALE BOW ECHOES SHOULD OCCUR THROUGH THE MID 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 29025.





...EVANS

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