MESOSCALE DISCUSSION 0786
   NWS STORM PREDICTION CENTER NORMAN OK
   0547 PM CDT SAT MAY 09 2009
   
   AREAS AFFECTED...PARTS OF UPSTATE NEW YORK INTO NEW ENGLAND
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 283...
   
   VALID 092247Z - 100015Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 283
   CONTINUES.
   
   SURFACE COLD POOL ON THE NORTHERN FLANK OF THE PRE-FRONTAL SQUALL
   LINE WILL ADVANCE ACROSS SOUTHERN COASTAL MAINE SHORTLY...WITH
   CONVECTION LIKELY WEAKENING AS COOLER MORE STABLE MARINE LAYER
   BECOMES THE NEAR SURFACE INFLOW LAYER SOURCE.  STORMS FED BY INFLOW
   FROM A LINGERING HEATED MOIST BOUNDARY LAYER ACROSS THE LOWER HUDSON
   VALLEY THRU WESTERN/CENTRAL MASSACHUSETTS WILL PROBABLY BE A BIT
   SLOWER TO WEAKEN...BUT DIMINISH TRENDS COULD COMMENCE WITH THE ONSET
   OF DIURNAL BOUNDARY LAYER COOLING AS EARLY AS 00-01Z.
   
   ..KERR.. 05/09/2009
   
   
   ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM...
   
   LAT...LON   41287464 41887458 42197376 42667270 43077202 43417144
               43817112 44037065 43557055 42667116 42067232 41007391
               41287464