

883 

WWUS20 KWNS 120533

SEL6

SPC WW 120533

OKZ000-121100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 466

NWS STORM PREDICTION CENTER NORMAN OK

1235 AM CDT SUN JUN 12 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST OKLAHOMA



EFFECTIVE THIS SUNDAY MORNING FROM 1235 AM UNTIL 600 AM 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST OF

TULSA OKLAHOMA TO 30 MILES SOUTH OF GROVE 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.



DISCUSSION...MCS WITH A RECENT HISTORY OF OBSERVED WIND GUSTS TO

60-70 MPH IS EXPECTED TO CONTINUE ESEWD ALONG AND S OF W-E ORIENTED

LOW-LEVEL BAROCLINIC ZONE EXTENDING FROM S OF PNC TO NEAR GMJ.  SLY

LLJ STRENGTHENING TO 40-45 KT SHOULD MAINTAIN A FEED OF A MOIST AND

MODERATELY UNSTABLE AIR MASS INTO CONVECTIVE SYSTEM WITH A CONTINUED

THREAT FOR DAMAGING WINDS AND SOME HAIL THROUGH THE EARLY MORNING

HOURS.



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 29030.





...MEAD

