MESOSCALE DISCUSSION 1585
   NWS STORM PREDICTION CENTER NORMAN OK
   0516 PM CDT THU JUL 16 2009
   
   AREAS AFFECTED...PORTIONS OF SRN/WRN NEW ENGLAND INTO THE LOWER
   HUDSON VALLEY
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 587...
   
   VALID 162216Z - 162315Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 587
   CONTINUES.
   
   AREAS DOWNSTREAM OF WW 587 ARE BEING MONITORED FOR THE POSSIBILITY
   OF AN ADDITIONAL WW INTO PORTIONS OF WRN/SRN NEW ENGLAND AND THE
   LOWER HUDSON VALLEY. UNCERTAINTIES PERSIST REGARDING THE OVERALL
   AMPLITUDE AND AREAL EXTENT OF THE THREAT E/SE OF WW 587...WITH
   ONGOING SEVERE EVENT LIKELY NEAR PEAK AND A DOWNWARD TREND EXPECTED
   DURING THE EVENING.
   
   RECENT RADAR IMAGERY DEPICTED GENERALLY SINGLE-CELL TO MULTICELL
   CLUSTERS PRIMARILY ACROSS THE SRN/ERN PORTIONS AND ALONG THE FAR NRN
   PERIPHERY OF WW 587. A FEW EMBEDDED SUPERCELL STRUCTURES WERE NOTED
   DURING THE PAST HOUR WHICH PRODUCED REPORTED HAIL FROM 1.75 TO 3 IN
   NEAR BTV AND ALB. WITH SURFACE DEW POINTS IN THE MIDDLE TO UPPER 60S
   AND TEMPERATURES HOLDING AROUND 80 ACROSS WRN/SRN NH AND WRN
   MA/CT...INSTABILITY SHOULD REMAIN SUFFICIENT AMIDST 30-40 KT
   EFFECTIVE SHEAR FOR AT LEAST AN ISOLATED HAIL/DAMAGING WIND THREAT
   TO PERSIST DOWNSTREAM OF WW 587. HOWEVER...THIS MAY REMAIN
   RELATIVELY SHORT IN DURATION AS ONSET OF NOCTURNAL COOLING
   CONTRIBUTES TO BOUNDARY LAYER STABILIZATION.
   
   ..GRAMS.. 07/16/2009
   
   
   ATTN...WFO...GYX...BOX...BTV...OKX...ALY...BGM...
   
   LAT...LON   45127136 44737118 43957134 42847153 41587197 41037329
               41017403 41427457 41647488 42027492 42367433 43437324
               44207294 44577342 44887458 45127136