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Mesoscale Discussion 999
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   MESOSCALE DISCUSSION 0999
   NWS STORM PREDICTION CENTER NORMAN OK
   0815 PM CDT FRI JUN 12 2015

   AREAS AFFECTED...E-CNTRL AND SERN NY INTO FAR SRN VT... WRN MA AND
   NWRN CT

   CONCERNING...TORNADO WATCH 292...

   VALID 130115Z - 130245Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 292 CONTINUES.

   SUMMARY...THE THREAT FOR MAINLY DAMAGING OUTFLOW WINDS WILL CONTINUE
   FOR THE NEXT COUPLE OF HOURS ACROSS ERN PORTIONS OF THE WATCH...AND
   PERHAPS LOCATIONS TO THE EAST OF IT.  AN ADDITIONAL WATCH IS NOT
   ANTICIPATED AT THIS TIME.

   DISCUSSION...AS OF 01Z...VOLUMETRIC RADAR DATA FROM ALBANY SHOWED A
   SHORT-SEGMENT BOW OVER RENSSELAER COUNTY WITH AN UPSTREAM
   LARGER-SCALE BOW WITH AN ASSOCIATED CYCLONIC BOOKEND VORTEX OVER ERN
   SCHOHARIE COUNTY.  MOVEMENT OF BOTH CONVECTIVE SYSTEMS WAS
   APPROXIMATELY 270/40 KT.

   MODIFYING THE 00Z ALBANY SOUNDING FOR CURRENT SURFACE CONDITIONS
   WITHIN THE IMMEDIATE INFLOW TO THESE STORMS SUGGESTS THAT
   INSTABILITY IS SLOWLY DIMINISHING.  NONETHELESS...DOWNSTREAM COLD
   POOL ELONGATION/PROPAGATION ---PARTIALLY AIDED BY DOWNWARD MOMENTUM
   TRANSFER OF 40-50 KT MID-TROPOSPHERIC FLOW-- WILL MAINTAIN A
   DAMAGING WIND THREAT INTO AT LEAST WRN PORTIONS OF MA THROUGH
   02-03Z.  HOWEVER...THIS THREAT SHOULD BECOME INCREASINGLY ISOLATED
   WITH TIME AS STORMS ENCOUNTER INCREASING AMOUNTS OF CONVECTIVE
   INHIBITION WITH EWD EXTENT.

   ..MEAD.. 06/13/2015


   ATTN...WFO...GYX...BOX...OKX...ALY...BGM...

   LAT...LON   41977466 42277493 42517474 42887456 43147426 43277375
               43127252 42597257 42077283 41737305 41597336 41407364
               41407406 41497430 41977466 

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Page last modified: June 13, 2015
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