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Mesoscale Discussion 139
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   MESOSCALE DISCUSSION 0139
   NWS STORM PREDICTION CENTER NORMAN OK
   1053 AM CST SUN FEB 10 2013
   
   AREAS AFFECTED...SERN AND ECNTRL LA THROUGH SWRN AND SCNTRL MS
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 101653Z - 101830Z
   
   PROBABILITY OF WATCH ISSUANCE...95 PERCENT
   
   SUMMARY...TORNADO WATCH WILL LIKELY NEED TO BE ISSUED TO INCLUDE
   SWRN THROUGH CNTRL MS AND A PORTION OF SERN LA. SOME OF THE COUNTIES
   CURRENTLY IN WW 31 OVER PORTIONS OF ERN LA MAY BE REDEFINED INTO THE
   NEW WW. PRIMARY THREATS WILL CONTINUE TO BE DAMAGING WIND AND A FEW
   TORNADOES.
   
   DISCUSSION...WARM FRONT EXTENDS FROM SERN LA THROUGH EXTREME SWRN MS
   INTO NERN LA WHERE IT INTERSECTS A SQUALL LINE THAT STRETCHES SWWD
   INTO SERN TX. GREATEST TORNADO POTENTIAL WILL PERSIST WITH THAT
   PORTION OF THE LINE NEAR AND SOUTH OF WARM FRONT WHERE BOUNDARY
   LAYER IS MORE UNSTABLE DUE TO INFLUX OF RICHER GULF MOISTURE.
   PORTION OF THE LINE MOVING INTO WCNTRL MS IS NORTH OF WARM FRONT
   WHERE THE SFC LAYER IS MORE STABLE...BUT THIS ACTIVITY WILL STILL
   POSE AN INITIAL DAMAGING WIND THREAT. AS THE WARM FRONT LIFTS NWD
   AND THE BOUNDARY LAYER MOISTENS AND DESTABILIZES...TORNADO THREAT
   WILL GRADUALLY DEVELOP NWD INTO SCNTRL MS THIS AFTERNOON.
   
   ..DIAL/MEAD.. 02/10/2013
   
   
   ATTN...WFO...JAN...LIX...LCH...SHV...
   
   LAT...LON   31489195 32379081 33078977 32408894 31538973 30439184
               30809260 31489195 
   
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