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Mesoscale Discussion 745
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   MESOSCALE DISCUSSION 0745
   NWS STORM PREDICTION CENTER NORMAN OK
   0503 PM CDT SUN MAY 24 2015

   AREAS AFFECTED...PORTIONS OF SRN/ERN LA AND SRN/WRN MS

   CONCERNING...TORNADO WATCH 204...

   VALID 242203Z - 250000Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 204 CONTINUES.

   SUMMARY...THE THREAT FOR A COUPLE OF TORNADOES AND LOCALLY DAMAGING
   WIND GUSTS CONTINUES ACROSS THE WW.

   DISCUSSION...ACROSS WW 204...NUMEROUS CONVECTIVE CELLS HAVE EVOLVED
   AHEAD OF A BROKEN BAND OF STRONG-TO-SEVERE TSTMS / ASSOCIATED LINE
   OF CONFLUENCE STRETCHING FROM SERN AR SWD TO S-CNTRL LA. MANY OF
   THESE CELLS HAVE EXHIBITED WEAK ROTATION...AND THE SEVERE POTENTIAL
   IS LIKELY TO BE MAINTAINED OR BOLSTERED SOME OVER THE NEXT FEW
   HOURS...AS FCST SOUNDINGS INDICATE BACKING OF THE WINDS IN THE
   LOWEST 1-KM THROUGH 01Z. IN TURN...EFFECTIVE SRH VALUES ARE EXPECTED
   TO BE ENHANCED SOME OVER THE NEXT FEW HOURS. IN COMBINATION WITH
   VERY RICH LOW-LEVEL MOISTURE /E.G. MEAN MIXING RATIOS UPWARDS OF
   15-16 G PER KG/ AND SOME INSOLATION AHEAD OF THE AXIS OF
   CONFLUENCE...THIS WIND PROFILE SHOULD CONTINUE TO SUPPORT A
   POTENTIAL FOR A COUPLE OF TORNADOES AS WELL AS SOME DAMAGING WIND
   GUSTS.

   ..PICCA.. 05/24/2015


   ATTN...WFO...MOB...JAN...LIX...LCH...

   LAT...LON   29119126 29469210 30699206 32599178 33109153 33169049
               32628972 30688858 30358852 29828890 28848900 29119126 

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