

446 

WWUS20 KWNS 112102

SEL6

SPC WW 112102

KSZ000-OKZ000-120400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 456

NWS STORM PREDICTION CENTER NORMAN OK

400 PM CDT SUN JUL 11 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR SOUTHEAST KANSAS

       PARTS OF NORTHERN INTO CENTRAL OKLAHOMA



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

1100 PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF

CLINTON OKLAHOMA TO 55 MILES EAST NORTHEAST OF BARTLESVILLE

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 452...WW 453...WW

454...WW 455...



DISCUSSION...TSTMS ARE EXPECTED TO INTENSIFY ALONG NE-SW ORIENTED

LOW-LEVEL CONVERGE ZONE WITHIN A HOT AND MOIST AIR MASS WITH MLCAPE

OF 3000-4000 J/KG.  REGION RESIDES ALONG THE SRN FRINGE OF STRONGER

MID AND HIGH-LEVEL FLOW ATTENDANT TO MID MS VALLEY SHORT WAVE TROUGH

WITH GENERALLY 30-40 KT OF DEEP WNWLY SHEAR.  RESULTANT ENVIRONMENT

WILL SUPPORT ORGANIZED STORMS INCLUDING SOME SUPERCELL STRUCTURES

WITH THE THREAT FOR DAMAGING WINDS AND HAIL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 29020.





...MEAD

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