

158 

WWUS20 KWNS 172210

SEL6

SPC WW 172210

NMZ000-TXZ000-180500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 336

NWS STORM PREDICTION CENTER NORMAN OK

515 PM CDT THU JUN 17 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST NEW MEXICO

       WEST TEXAS



EFFECTIVE THIS THURSDAY AFTERNOON FROM 515 PM UNTIL MIDNIGHT CDT.



HAIL TO 2 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES WEST

SOUTHWEST OF FORT STOCKTON TEXAS TO 35 MILES NORTHEAST OF CANNON

AFB NEW MEXICO.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 332...WW 333...WW

334...WW 335...



DISCUSSION...MOIST UPSLOPE FLOW AND DIURNAL HEATING WERE

CONTRIBUTING TO SCATTERED TSTM DEVELOPMENT TO THE SOUTH OF AND ALONG

WELL-DEFINED  DRYLINE FROM WEST OF LBB SWWD. GIVEN MAXIMUM IN

DIURNAL  DESTABILIZATION AND WEAK CAP...ADDITIONAL TSTM DEVELOPMENT

CAN BE  EXPECTED THROUGH THE EVENING. DEEP-LAYER DIRECTIONAL

SHEAR...WHILE  LIMITED...MAY BE SUFFICIENT ENOUGH FOR A FEW

INTENSE/PERSISTENT  CELLS...OR MULTICELLS...GIVEN MAGNITUDE OF

INSTABILITY...MLCAPE TO 2000 J/KG. PRIMARY THREAT FROM A FEW OF

THESE STORMS WILL BE DAMAGING DOWNBURST WINDS GIVEN DCAPE VALUES

WELL IN EXCESS OF 1000 J/KG.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 27015.





...CARBIN

