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Severe Thunderstorm Watch 612
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WW0612 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Low Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 612
   NWS STORM PREDICTION CENTER NORMAN OK
   315 PM CDT TUE JUL 21 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF SOUTHERN ARKANSAS
          PARTS OF NORTHERN LOUISIANA
          PARTS OF NORTHEAST TEXAS
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 315 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 70
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES NORTH
   NORTHEAST OF MONROE LOUISIANA TO 30 MILES WEST NORTHWEST OF
   LONGVIEW TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
   
   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...AIR MASS IN ADVANCE OF COLD FRONT VICINITY OF RED RIVER
   CONTINUES TO DESTABILIZE WITH MLCAPES AOA 2000 J/KG AND LITTLE
   REMAINING CINH.  THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY
   FROM N TO S ACROSS THE WATCH WITH SUFFICIENT SHEAR FOR ISOLATED
   SUPERCELLS.  PRIMARY THREAT WILL BE WIND DAMAGE ASSOCIATED WITH
   STRONGER UPDRAFTS...HOWEVER ISOLATED BRIEF TORNADOES WILL ALSO BE
   POSSIBLE WITH ANY SUPERCELL.
   
   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 27025.
   
   
   ...HALES
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