

549 

WWUS20 KWNS 060943

SEL6

SPC WW 060943

OKZ000-TXZ000-061700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 756

NWS STORM PREDICTION CENTER NORMAN OK

440 AM CDT TUE OCT 6 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST THROUGH EAST CENTRAL OKLAHOMA

       NORTH TEXAS



EFFECTIVE THIS TUESDAY MORNING FROM 440 AM UNTIL NOON CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF

WICHITA FALLS TEXAS TO 10 MILES EAST NORTHEAST OF POTEAU

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...TSTMS FORMING IN AREA OF SUSTAINED WARM/MOIST ADVECTION

AHEAD OF COLD FRONT APPROACHING THE RED RIVER EXPECTED TO

MOVE/DEVELOP ENEWD THROUGH LATE THIS MORNING AS REGION IS GLANCED BY

UPR DIVERGENCE ASSOCIATED WITH SHORTWAVE IMPULSE CROSSING THE CNTRL

PLNS/MID MO VLY.  TEMPORAL VEERING OF CONFLUENT SWLY LLJ ALSO

SUGGESTS POTENTIAL FOR REGENERATIVE ACTIVITY TOWARD THE WSW ATOP

DEEPENING POST-FRONTAL COOL DOME.  QUALITY OF SLIGHTLY ELEVATED

MOISTURE INFLOW WITH EWD EXTENT /PW AOA 1,50 INCHES/...AND 50-60 KT

UNIDIRECTIONAL CLOUD LAYER SHEAR...FURTHER SUGGEST LIKELIHOOD FOR A

FEW SUPERCELLS WITH HAIL AND POSSIBLY LOCALLY DMGG WIND.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50

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

MOTION VECTOR 26040.





...CORFIDI

