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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 268

NWS STORM PREDICTION CENTER NORMAN OK

105 PM MDT TUE MAY 8 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST AND SOUTH-CENTRAL NEW MEXICO

       FAR WESTERN TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 105 PM UNTIL

800 PM MDT.



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 EAST AND WEST OF A LINE FROM 65 MILES WEST

NORTHWEST OF SOCORRO NEW MEXICO TO 55 MILES SOUTHEAST OF MARFA

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 267...



DISCUSSION...TSTMS ARE DEVELOPING THIS AFTERNOON ALONG THE HIGH

TERRAIN WITHIN A DESTABILIZING ENVIRONMENT WITH SBCAPE VALUES OF

AROUND 1000 J/KG.  A BELT OF STRONGER MID/HIGH-LEVEL FLOW EXISTS

DOWNSTREAM FROM SWRN U.S. UPPER LOW WITH VERTICAL SHEAR PROFILES

SUPPORTIVE OF UPDRAFT ROTATION/SUSTENANCE.  LARGE HAIL WILL BE THE

PRIMARY HAZARD...THOUGH DAMAGING WIND GUSTS ARE ALSO POSSIBLE.



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 21020.





...MEAD

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