

908 

WWUS20 KWNS 101338

SEL3

SPC WW 101338

NMZ000-TXZ000-102000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 363

NWS STORM PREDICTION CENTER NORMAN OK

840 AM CDT WED JUN 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME SOUTHEAST NEW MEXICO

       THE SOUTH PLAINS OF WEST TEXAS



EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 840 AM UNTIL

300 PM 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 85 MILES WEST

SOUTHWEST OF LUBBOCK TEXAS TO 40 MILES SOUTH SOUTHEAST OF

CHILDRESS TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...ELEVATED CONVECTION HAS BEEN INCREASING IN A BAND OVER

W TX/SE NM...IN ADVANCE OF A LEAD SHORTWAVE TROUGH THAT IS EJECTING

NEWD OVER FAR W TX AND SE NM.  GIVEN THE PRESENCE OF STEEP LAPSE

RATES AND A NWD INCREASE IN MOISTURE TO THE E OF THE ONGOING

STORMS...IT APPEARS PROBABLE THAT THIS CONVECTION WILL PERSIST FOR

SEVERAL MORE HOURS WITH THE THREAT FOR LARGE HAIL AND DAMAGING

WINDS.



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 24030.





...THOMPSON

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