MESOSCALE DISCUSSION 1008

 MESOSCALE DISCUSSION 1008
   NWS STORM PREDICTION CENTER NORMAN OK
   0249 PM CDT FRI JUN 01 2012
   
   AREAS AFFECTED...SERN PA...ERN MD...ERN VA...D.C...NRN NC
   
   CONCERNING...TORNADO WATCH 333...
   
   VALID 011949Z - 012045Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 333 CONTINUES.
   
   SUMMARY...TORNADO THREAT CONTINUES IN ASSOCIATION WITH ONGOING
   SUPERCELL ACTIVITY.
   
   DISCUSSION...NUMEROUS DISCRETE SUPERCELLS HAVE EVOLVED ACROSS THE
   WARM SECTOR FROM PORTIONS OF NC...NWD INTO MD.  THIS NRN ACTIVITY IS
   COINCIDENT WITH ADVANCING WARM FRONT THAT NOW STRETCHES FROM BEDFORD
   COUNTY PA...SEWD INTO CNTRL DE NEAR DOV.  SEVERAL OF THE DISCRETE
   SUPERCELLS HAVE EXHIBITED TORNADIC CHARACTERISTICS AS THEY LIFT NEWD
   WITH ONE LONGER-LIVED UPDRAFT IN PARTICULAR NOW CROSSING THE WARM
   FRONT OVER BALTIMORE COUNTY IN MD.  NRN SUPERCELLS SHOULD ENCOUNTER
   SOMEWHAT HIGHER LOW LEVEL HELICITY ALONG THE WARM FRONT WHICH MAY
   ENHANCE THE TORNADIC POTENTIAL WHILE WITHIN THIS ZONE.
   
   HIGHER THETA-E AIR MASS SHOULD GRADUALLY RETURN INTO SERN PA/DE AND
   SWRN NJ OVER THE NEXT FEW HOURS.  SUPERCELL ACTIVITY WILL INCREASE
   AS THIS BOUNDARY ADVANCES NWD.
   
   FRONTAL SQUALL LINE SHOULD APPROACH THE WRN-MOST PART OF WW 333 BY
   00Z AND AN ENHANCED DAMAGING WIND THREAT MAY ENSUE WITH ASSOCIATED
   CONVECTION.
   
   ..DARROW.. 06/01/2012
   
   
   ATTN...WFO...PHI...AKQ...CTP...LWX...RAH...RNK...