

746 

WWUS20 KWNS 140124

SEL2

SPC WW 140124

OKZ000-TXZ000-140900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 402

NWS STORM PREDICTION CENTER NORMAN OK

820 PM CDT SAT JUN 13 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL OKLAHOMA

       NORTH TEXAS



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 820 PM

UNTIL 400 AM CDT.



HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 100

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHWEST OF

ALVA OKLAHOMA TO 60 MILES SOUTH SOUTHWEST OF SHERMAN TEXAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 397...WW 398...WW

399...WW 400...WW 401...



DISCUSSION...COMPLEX...LOOSELY-ORGANIZED MCS NOW EVOLVING OVER NW TX

AND THE SE PART OF THE TX PANHANDLE EXPECTED TO MOVE/DEVELOP

GENERALLY E OR ENE INTO N TX AND CNTRL OK LATER TONIGHT.  DIURNAL

CIN INCREASE WILL FURTHER COMPLICATE AND POSSIBLY HINDER EWD STORM

PROPAGATION.  BUT COMBINATION OF SUSTAINED...VERY MOIST ESELY LOW

LVL FLOW /ESPECIALLY N OF STALLED FRONT OVER SRN OK/...MODERATE WLY

MID LVL FLOW...AND VERY DEEP EML SUGGEST GOOD CHANCE FOR DMGG WET

MICROBURSTS...SVR HAIL...AND POSSIBLY A BRIEF TORNADO OR TWO AS

UPSCALE DEVELOPMENT CONTINUES.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 26025.





...CORFIDI

