Severe weather will be likely in the Northeast tomorrow with several chances for severe thunderstorm development.  Lead s/w energy moving through W PA into NY and New England will generate early development of severe weather.  Leeward troughiness will also create a few strong to severe storms across E PA into MD/VA but these storms will not have much to work with in terms of deep layer shear.  Main flow aloft will remain to the N and W until later when the greatest height falls acco,pany the cold front.  This is where the best chance for severe weather will be for E PA/NJ/DE/MD, during the nighttime hours with leftover instability and increasing deep layer shear for storm organization.  Due to the complex nature of the convection with the possibility of earlier remnant outflow boundaries becoming focus for development later in the night and/or convective overturning with earlier initiation if multicells can organize, it is hard to determine the severity of the overnight convection.  But as of right now it would not take much for storm to become sfc based with the weak CIN and strong low level/sfc convergence.  The main threats will be for damaging winds and marginally severe hail.