MESOSCALE DISCUSSION 1677
   NWS STORM PREDICTION CENTER NORMAN OK
   1156 AM CDT SUN JUL 26 2009
   
   AREAS AFFECTED...FAR ERN OH/WRN PA/WRN NY
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 261656Z - 261900Z
   
   STORMS SHOULD CONTINUE TO SLOWLY INCREASE/INTENSIFY ACROSS THIS
   REGION...THOUGH MARGINAL INSTABILITY SUGGESTS ONLY A
   LIMITED/ISOLATED SEVERE THREAT -- AND THUS WW APPEARS UNLIKELY.
   
   RECENT RADAR LOOP SHOWS CONVECTION SLOWLY INCREASING ACROSS THIS
   REGION...AHEAD OF THE GREAT LAKES UPPER LOW AND
   ASSOCIATED/ILL-DEFINED FRONT CROSSING ERN OH.  WHILE INSTABILITY IS
   FORECAST TO REMAIN LIMITED /GENERALLY LESS THAN 1000 J/KG
   MIXED-LAYER CAPE/...MODERATE WSWLY FLOW ALOFT MAY ALLOW A FEW
   SMALL-SCALE/MULTICELL BANDS OF STORMS TO ORGANIZE AND MOVE ENEWD
   NEAR 30 KT.  THE STRONGEST OF THESE BANDS/CLUSTERS COULD PRODUCE
   MARGINALLY-SEVERE WIND GUSTS AND/OR HAIL..BUT OVERALL EXPECT THE
   THREAT TO REMAIN ISOLATED/LIMITED THROUGH THE AFTERNOON.
   
   ..GOSS.. 07/26/2009
   
   
   ATTN...WFO...BGM...BUF...CTP...PBZ...CLE...
   
   LAT...LON   43567912 43737799 43407711 41587728 40037924 39988045
               40798110 41958083 42857918 43567912