When these storms are hurricanes and they are just making landfall the tornados produced are usually weaker. Low end EF2 or lower. When they move inland, weaken to a sloppy low pressure area while transporting deep tropical moisture, and begin interacting with fronts and encountering wind shear is when deeper convection begins to develop and becomes supercellular in nature. Last night was a very good example of that. Stronger, long track tornados associated with severe thunderstorms, torrential rain, a lot of lightning with the stronger storms. The really odd thing of course was location. Eastern PA, NJ, NYC and LI, CT, and Cape Cod. Very rare event obviously.