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Mesoscale Discussion 1249
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   MESOSCALE DISCUSSION 1249
   NWS STORM PREDICTION CENTER NORMAN OK
   0248 PM CDT TUE JUN 30 2015

   AREAS AFFECTED...PORTIONS OF OH/PA/MD/VA/WV/KY

   CONCERNING...SEVERE THUNDERSTORM WATCH 371...372...373...

   VALID 301948Z - 302145Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   371...372...373...CONTINUES.

   SUMMARY...THE RISK FOR TSTMS WITH DMGG WINDS AND HAIL CONTINUES
   ACROSS REMAINING-VALID PORTIONS OF THE SEVERE THUNDERSTORM WATCH
   AREAS.

   DISCUSSION...ONGOING CONVECTIVE CLUSTERS CONTINUE TO GROW INTO A
   LOOSELY ORGANIZED MCS WITH A LEADING LINE FROM FAR NRN KY TO
   S-CNTRL/E-CNTRL OHIO. THIS ACTIVITY WILL CONTINUE TO SPREAD EWD
   TOWARD/ACROSS THE OHIO RIVER VALLEY. ADDITIONAL TSTMS MAY
   POTENTIALLY DEVELOP IN ADVANCE OF THIS SYSTEM THROUGH PEAK
   HEATING...WHICH IS SUPPORTING 500-1500 J/KG OF MLCAPE.
   PBZ...JKL...AND RLX VWPS CONTINUE TO DEPICT AROUND 20-30 KT OF WLY
   FLOW IN THE 2-3-KM LAYER THAT MAY SUPPORT ISOLATED TO WIDELY
   SCATTERED DMGG WIND GUSTS VIA CONVECTIVE MOMENTUM TRANSPORT --
   ESPECIALLY WITH ACTIVITY SPREADING ACROSS PARTS OF THE MIDDLE/UPPER
   OHIO VALLEY IN THE SHORT-TERM.

   ..COHEN.. 06/30/2015


   ATTN...WFO...CTP...LWX...RNK...PBZ...RLX...CLE...MRX...JKL...
   ILN...LMK...

   LAT...LON   38648486 38888340 39368216 40688136 41298040 41617932
               41597804 41027749 40077749 38707783 37277906 36698079
               36808277 37438436 38648486 

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Page last modified: June 30, 2015
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