MESOSCALE DISCUSSION 0330
   NWS STORM PREDICTION CENTER NORMAN OK
   0453 PM CDT SUN MAR 29 2009

   AREAS AFFECTED...EXTREME ERN PA...WRN NJ...NRN DE AND EXTREME NERN
   MD

   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 

   VALID 292153Z - 292330Z

   SVR THREAT WILL EXIST ACROSS EXTREME ERN PA...NJ...NRN DE AND NERN
   MD FOR A FEW MORE HOURS.  DMGG WIND GUSTS AND LARGE HAIL ARE
   LIKELY...BUT A TORNADO RISK CANNOT BE RULED OUT SOUTH OF A LINE FROM
   KPTW-KDYL SWD TO INCLUDE ALL OF THE PHL METRO AREA. 

   BKN LINE OF TSTMS...INCLUDING SUPERCELLS...CONTINUES TO ORGANIZE
   FROM AVOCA SWD TO BALTIMORE.  INTENSE CELL THAT PRODUCED SVR WIND
   GUSTS IN READING HAS MOVED N OF THE WRMFNT BUT WILL AFFECT KABE-KUKT
   REGION NEWD INTO NRN NJ AND PERHAPS WRN LONG ISLAND WITH A LARGE
   HAIL THREAT FOR A FEW MORE HOURS.

   FARTHER S...THERE SEEMS TO BE AN INCREASING THREAT FOR SUPERCELLS
   AND TORNADOES INVOF THE WRMFNT/SFC LOW ACROSS THE PHL METRO AREA
   WHERE 2-HRLY PRESSURE FALLS WERE IN EXCESS OF 3 MB. HERE...STORMS
   DEVELOPING OVER CHESTER COUNTY SWD INTO NERN MD WILL LIKELY MOVE ENE
   WITHIN THE CAPE AXIS TOWARD PHL.  THESE STORMS WILL HAVE
   AVAILABILITY TO THE STRONGEST STORM RELATIVE HELICITY AND POTENTIAL
   FOR TORNADOES AS THEY CROSS THE WRMFNT. 

   AFTER COORDINATION WITH THE MOUNT HOLLY OFFICE...A SVR WEATHER WATCH
   WILL NOT BE ISSUED.  HOWEVER...THERE WILL NEED TO BE A HEIGHTENED
   AWARENESS FOR THE POTENTIAL FOR SVR WEATHER...INCLUDING TORNADOES IN
   THE PHL METRO AREA FROM 2230-00Z.  AT LEAST ISOLD LARGE HAIL/DMGG
   WIND THREATS WILL EXTEND ENE INTO MUCH OF NJ THROUGH MID-EVENING.

   ..RACY.. 03/29/2009

   ATTN...WFO...OKX...PHI...

   LAT...LON   40477562 40877551 41057527 41097479 40577434 40277437
               40037453 39827479 39697519 39607544 39577587 39717592
               40477562