

068 

WWUS20 KWNS 040312

SEL9

SPC WW 040312

OKZ000-040900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 349

NWS STORM PREDICTION CENTER NORMAN OK

1005 PM CDT SUN JUN 3 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND WEST CENTRAL OKLAHOMA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1005 PM UNTIL

400 AM CDT.



HAIL TO 1.5 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 EAST AND WEST OF A LINE FROM 60 MILES NORTH

NORTHEAST OF CLINTON OKLAHOMA TO 35 MILES SOUTH SOUTHWEST OF FORT

SILL OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

TORNADO WATCH NUMBER 347. WATCH NUMBER 347 WILL NOT BE IN EFFECT

AFTER 1005 PM CDT. CONTINUE...WW 348...



DISCUSSION...TSTMS/SUPERCELLS FAILED TO BECOME SUSTAINED IN NW OK

EARLIER THIS EVE...POSSIBLY AS A RESULT OF RELATIVELY WEAK LOW LVL

CONFLUENCE AND THE ABSENCE OF A WELL-DEFINED W-E BOUNDARY.  STORMS

HAVE...HOWEVER...RECENTLY FORMED IN THE REGION...MOST LIKELY ALONG

WRN EDGE OF STRENGTHENING SLY LLJ.  THIS ACTIVITY MAY YET GROW INTO

AN MCS AS THE STORMS DEVELOP FARTHER E AND TAP INCREASINGLY RICH LOW

LVL MOISTURE IN CNTRL/ERN PART OF STATE.



AREA VWP DATA SUGGEST THAT...IN CONTRAST TO STRENGTHENING

LLJ...MID/UPR LVL FLOW LIKELY WILL REMAIN WEAK OR FURTHER WEAKEN AS

AXIS OF UPR IMPULSE NOW OVER SW KS/NW OK CONTINUES ESEWD.  WHILE

WEAKENING MID/UPR LVL FLOW MAY LIMIT STORM

ORGANIZATION/SUSTENANCE...STEEP LAPSE RATES ABOVE THE COOLING

BOUNDARY LAYER AND INCREASING MOISTURE WITH EWD EXTENT MAY SUPPORT

LOCALLY DMGG WIND/SVR HAIL.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 31020.





...CORFIDI

