SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 159
   NWS STORM PREDICTION CENTER NORMAN OK
   335 PM MDT SUN APR 17 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHEASTERN NEW MEXICO
          FAR WESTERN TEXAS
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 335 PM UNTIL 1000
   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 85
   STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHWEST OF
   CANNON AFB NEW MEXICO TO 70 MILES WEST OF FORT STOCKTON TEXAS. 
   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...CONTINUE...WW 158...
   
   DISCUSSION...MODERATE INSTABILITY HAS DEVELOPED ACROSS SERN NM THIS
   AFTERNOON UNDER MODEST WLY FLOW ALOFT. THOUGH WINDS ALOFT REMAIN IN
   THE 20-30 KT RANGE...SELY SURFACE WINDS ARE BOOSTING DEEP LAYER
   SHEAR AND SUGGEST A FEW SUPERCELLS/LINES WILL SPREAD EWD THROUGH THE
   EVENING.  LARGE HAIL AND ISOLATED DAMAGING WINDS ARE EXPECTED TO
   ACCOMPANY STRONGER STORMS.
   
   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 26020.
   
   
   ...EVANS