

696 

WWUS20 KWNS 040427

SEL0

SPC WW 040427

ARZ000-OKZ000-041200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 350

NWS STORM PREDICTION CENTER NORMAN OK

1125 PM CDT SUN JUN 3 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST ARKANSAS

       NORTHEAST AND EAST CENTRAL OKLAHOMA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1125 PM UNTIL

700 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTH OF

CHANDLER OKLAHOMA TO 40 MILES EAST NORTHEAST OF FORT SMITH

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 348...WW 349...



DISCUSSION...TSTMS HAVE FORMED RAPIDLY IN THE PAST HALF HOUR OVER NE

OK...POSSIBLY RELATED TO INCREASED WAA/ASCENT ASSOCIATED WITH

CONTINUED ESE MOTION OF UPSTREAM SHORTWAVE IMPULSE.  GIVEN DEGREE OF

BUOYANCY ABOVE NOCTURNAL BOUNDARY LAYER...AVAILABILITY OF RICH

MOISTURE...AND LIKELIHOOD FOR ADDITIONAL STORM DEVELOPMENT...STORMS

WILL BE CAPABLE OF SVR HAIL/LOCALLY DMGG WIND DESPITE MODEST DEEP

SHEAR.



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.





...CORFIDI

