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Mesoscale Discussion 142
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   MESOSCALE DISCUSSION 0142
   NWS STORM PREDICTION CENTER NORMAN OK
   0509 PM CDT WED MAR 25 2015

   AREAS AFFECTED...WCNTRL OK

   CONCERNING...SEVERE THUNDERSTORM WATCH 6...

   VALID 252209Z - 252315Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 6 CONTINUES.

   SUMMARY...THUNDERSTORMS ARE EXPECTED TO INTENSIFY OVER WCNTRL OK.
   RATHER THAN ISSUE A NEW WW...ADDITIONAL COUNTIES HAVE BEEN ADDED TO
   EXISTING WW. LARGE HAIL AND DAMAGING WIND GUSTS SHOULD REMAIN THE
   PRIMARY THREATS.

   DISCUSSION...COLD FRONT EXTENDS FROM NRN PORTIONS OF WRN TX INTO
   SWRN AND WCNTRL OK THEN NEWD AS A STATIONARY FRONT THROUGH THE
   REMAINDER OF OK INTO SRN MO. TRENDS IN SATELLITE DATA INDICATE RAPID
   CUMULUS DEVELOPMENT ALONG THE COLD FRONT OVER WCNTRL OK.
   THUNDERSTORMS HAVE DEVELOPED AS DEEPER ASCENT ACCOMPANYING A
   PROGRESSIVE SHORTWAVE TROUGH PHASES WITH LOW-LEVEL FRONTAL
   CONVERGENCE. THE ATMOSPHERE IN THIS REGION IS STRONGLY UNSTABLE WITH
   2500-3000 J/KG MLCAPE. INITIAL STORMS MAY BE DISCRETE...BUT SOME OF
   ACTIVITY MIGHT EVENTUALLY EVOLVE INTO LINE SEGMENTS. LATEST VWP DATA
   INDICATE STRONG /45-50 KT/ 0-6 KM SHEAR SUPPORTIVE OF
   SUPERCELLS...ALONG WITH 150-200 M2/S2 0-1 KM STORM RELATIVE
   HELICITY. WHILE A BRIEF TORNADO CANNOT BE RULED OUT...OVERALL
   TORNADO THREAT SHOULD REMAIN LIMITED BY TENDENCY FOR STORMS TO BE
   UNDERCUT BY THE FRONT AND LESS THAN OPTIMAL BOUNDARY-LAYER
   TEMPERATURE-DEWPOINT SPREADS.

   ..DIAL/EDWARDS.. 03/25/2015


   ATTN...WFO...OUN...

   LAT...LON   35699812 35299789 34719810 34529843 34539883 34879911
               35309904 35699812 

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Page last modified: March 25, 2015
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