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Mesoscale Discussion 396
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   MESOSCALE DISCUSSION 0396
   NWS STORM PREDICTION CENTER NORMAN OK
   0347 PM CDT THU APR 24 2014

   AREAS AFFECTED...PORTIONS OF CNTRL/SRN MO...ERN OK...AR...WRN
   TN...NWRN MS...NRN AR...NERN TX

   CONCERNING...SEVERE THUNDERSTORM WATCH 89...90...

   VALID 242047Z - 242215Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   89...90...CONTINUES.

   SUMMARY...THE POTENTIAL FOR THUNDERSTORMS WITH DMGG WINDS AND SVR
   HAIL CONTINUES ACROSS SEVERE THUNDERSTORM WATCHES 89 AND 90.

   DISCUSSION...AHEAD OF A COLD FRONT EXTENDING FROM 1002-MB SFC LOW
   PRESSURE IN N-CNTRL MO INTO N-CNTRL TX...UPPER 50S-LOWER 60S SFC
   DEWPOINTS CONTINUE SPREADING NEWD AS SWLY TRAJECTORIES ENCOURAGE
   MOISTURE TRANSPORT BEHIND A RETREATING WARM FRONT. STEEP MID-LEVEL
   LAPSE RATES ACCOMPANYING AN EML PLUME CONTINUE TO FOSTER
   500-2000 J/KG MLCAPE...GREATEST FROM THE ARKLATEX EWD TO THE
   ARKLAMISS. STRONG DCVA/ASCENT PRECEDING A WELL-DEFINED MID/UPPER PV
   MAX APPROACHING ERN KS/OK...FRONTAL ASCENT...AND ASCENT WITHIN A
   WARM ADVECTION ZONE LEADING THE STRONGER DCVA WILL ALL FOSTER THE
   CONTINUATION OF FORWARD-PROPAGATING STORM CLUSTERS THIS AFTERNOON.
   THIS WILL BE SUPPORTED BY 50-60-KT MID-LEVEL WSWLYS PER VWP
   DATA...WHICH WILL OFFER SUFFICIENT DEEP SHEAR FOR STORM
   SUSTENANCE/ORGANIZATION WITH BOWING SEGMENTS AND MULTICELLS
   POTENTIALLY PRODUCING DMGG WINDS AND SVR HAIL. UPDRAFTS MAY REMAIN
   SOMEWHAT MORE DISCRETE OVER THE SRN FRINGES OF STRONGER ASCENT INTO
   SRN AR AND NRN LA AND IN ASSOCIATION WITH WARM ADVECTION PLUME
   TOWARD THE MS RIVER WHERE ONE OR TWO TORNADOES COULD OCCUR.

   ..COHEN.. 04/24/2014


   ATTN...WFO...PAH...MEG...JAN...LSX...LZK...SGF...SHV...EAX...
   TSA...OUN...

   LAT...LON   32319259 32589421 34499572 36889468 38419349 39009217
               38899154 38239122 37309161 36589156 36399030 36358931
               35618934 32779074 32319259 

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Page last modified: April 24, 2014
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