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Severe Thunderstorm Watch 290
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WW0290 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 290
   NWS STORM PREDICTION CENTER NORMAN OK
   540 PM CDT TUE MAY 12 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          THE SOUTHEAST TEXAS PANHANDLE INTO WEST CENTRAL TEXAS
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 540 PM UNTIL
   1100 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 45
   STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH
   NORTHWEST OF CHILDRESS TEXAS TO 40 MILES SOUTHWEST OF SAN ANGELO
   TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
   WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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 289...
   
   DISCUSSION...HIGH-BASED CONVECTION IN THE DEEPLY MIXED ENVIRONMENT
   ALONG AND W OF THE DRYLINE MAY SPREAD E FAR ENOUGH TO REACH SOMEWHAT
   RICHER MOISTURE AND STRONGER INSTABILITY NEAR THE CAPROCK THIS
   EVENING.  VERY STEEP MID LEVEL LAPSE RATES AND MODEST DEEP LAYER
   VERTICAL SHEAR IN ADVANCE OF A WEAK MID LEVEL WAVE EJECTING NEWD
   FROM SE NM COULD SUPPORT A FEW SUPERCELLS WITH LARGE HAIL/DAMAGING
   WINDS...AND CONVECTION MAY EVOLVE INTO ONE OR TWO SMALL CLUSTERS
   EARLY TONIGHT.  THE EWD EXTENT OF THE SEVERE THREAT WILL BE LIMITED
   BY STRONG CONVECTIVE INHIBITION AFTER SUNSET.
   
   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 27020.
   
   
   ...THOMPSON
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