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Mesoscale Discussion 878
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   MESOSCALE DISCUSSION 0878
   NWS STORM PREDICTION CENTER NORMAN OK
   0849 PM CDT WED JUN 03 2015

   AREAS AFFECTED...CNTRL INTO NERN AND E-CNTRL WY

   CONCERNING...TORNADO WATCH 251...

   VALID 040149Z - 040245Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 251 CONTINUES.

   SUMMARY...ISOLD LARGE HAIL/STRONG TO SEVERE WIND GUST RISK WILL
   CONTINUE FOR THE NEXT 1-3 HOURS.  A LOCAL EXTENSION-IN-TIME COULD
   ADDRESS A CONFINED CORRIDOR WHERE SEVERE IS MORE PROBABLE IF IT
   APPEARS A SEVERE THREAT WILL PERSIST BEYOND THE 03 UTC WATCH
   EXPIRATION TIME.

   DISCUSSION...RADAR MOSAIC SHOWS WIDELY SCATTERED STORMS ACROSS CNTRL
   INTO NERN AND E-CNTRL WY.  SURFACE OBSERVATIONS HAVE SHOWN AREAS
   NEAR CPR WHERE CONVECTIVE OVERTURNING AS LIKELY LESSENED THE STRONG
   STORM THREAT...AS WELL AS AREAS WHERE ARCING OUTFLOW ACCOMPANYING
   THE MORE VIGOROUS STORMS HAS LIKELY EXPELLED SOME POTENTIAL
   INSTABILITY.  NEEDLESS TO SAY...A MID-LEVEL SHORTWAVE TROUGH LOCATED
   OVER NWRN UT INTO SRN ID WILL LEND INCREASING LARGE-SCALE
   ASCENT/SUPPORT FOR STORM DEVELOPMENT AS IT APPROACHES CNTRL WY EARLY
   TONIGHT.  DESPITE BOUNDARY-LAYER STABILIZATION OWING TO DIURNAL
   COOLING...SOME RISK FOR ISOLD STRONG TO SEVERE STORMS PRIMARILY
   CAPABLE OF MARGINALLY SEVERE HAIL AND STRONG WIND GUSTS WILL LIKELY
   CONTINUE FOR THE NEXT FEW HOURS.

   ..SMITH.. 06/04/2015


   ATTN...WFO...UNR...CYS...BYZ...RIW...

   LAT...LON   42610903 42340735 42390403 43000351 44150409 44770571
               43860888 43490945 42610903 

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Page last modified: June 04, 2015
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