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Tornado Watch 13
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WW0013 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Moderate
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.
   SEL3
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 13
   NWS STORM PREDICTION CENTER NORMAN OK
   1005 PM CST TUE JAN 24 2012
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTH CENTRAL TEXAS
   
   EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1005 PM
   UNTIL 500 AM CST.
   
   TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
   MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF AUSTIN
   TEXAS TO 35 MILES WEST SOUTHWEST OF LAREDO TEXAS.  FOR A COMPLETE
   DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
   (WOUS64 KWNS WOU3).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   DISCUSSION...ASCENT IN ADVANCE OF A MIDLEVEL LOW OVER FAR W TX WILL
   SPREAD EWD OVERNIGHT FROM THE RIO GRANDE TO S CENTRAL TX.  A
   MOIST/UNSTABLE AIR MASS IS ALREADY IN PLACE ACROSS S TX...AND THE
   CAP WILL WEAKEN SUFFICIENTLY TO SUPPORT THUNDERSTORM DEVELOPMENT
   FROM THE LAREDO AREA NEWD.  MEANWHILE...LOW-LEVEL SHEAR IS
   RELATIVELY STRONG ALONG THE CORRIDOR OF A 40+ KT LLJ /EFFECTIVE SRH
   AOA 300 M2 PER S2/...WITH DEEP-LAYER SHEAR IN THE RANGE FAVORABLE
   FOR SUPERCELLS.  A TORNADO OR TWO WILL BE POSSIBLE WITH THE INITIAL
   /MORE DISCRETE/ STORMS EXPECTED TO FORM IN THE NEXT COUPLE OF HOURS
   NEAR THE RIO GRANDE...ALONG WITH LARGE HAIL.  THE DAMAGING WIND RISK
   WILL INCREASE SOME LATER TONIGHT AS STORMS EVOLVE INTO A LARGER
   LINEAR MCS AND MOVE EWD.
   
   AVIATION...TORNADOES AND 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 23030.
   
   
   ...THOMPSON
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