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Severe Thunderstorm Watch 725
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WW0725 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Low Low
Severe Hail 2"+ Hail
Moderate 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.
   SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 725
   NWS STORM PREDICTION CENTER NORMAN OK
   1000 PM CDT THU AUG 20 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHERN ARKANSAS
          NORTHERN LOUISIANA
          SOUTHERN OKLAHOMA
          NORTH CENTRAL AND NORTHEAST TEXAS
   
   EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1000 PM
   UNTIL 400 AM CDT.
   
   HAIL TO 1.5 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 55
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST OF
   SHERMAN TEXAS TO 10 MILES SOUTHEAST OF EL DORADO ARKANSAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU5).
   
   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...THIS SEVERE THUNDERSTORM WATCH REPLACES
   SEVERE THUNDERSTORM WATCH NUMBER 722. WATCH NUMBER 722 WILL NOT
   BE IN EFFECT AFTER 1000 PM CDT. CONTINUE...WW 723...WW 724...
   
   DISCUSSION...TSTMS EXPECTED TO CONTINUE FORMING INVOF THE RED RVR
   AND OVER THE ARKLATEX AS POCKET OF STRONG INSTABILITY IS
   INCREASINGLY UNDERCUT BY STRENGTHENING COLD FRONT.  ALTHOUGH LOW LVL
   INFLOW WILL BE WEAK...INCREASING UPLIFT ABOVE FRONTAL
   SURFACE...GLANCING INFLUENCE OF MO UPR VORT...AND MOIST LOW LVL
   ENVIRONMENT SUGGEST POTENTIAL FOR ISOLD DMGG WIND AND HAIL THROUGH
   EARLY FRIDAY.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 30020.
   
   
   ...CORFIDI
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