One aspect of this storm that is still evolving is the Sunday eve/night timeframe. Most models have a norlun type trough that develops as the coastal is moving ots....I'm not sure if it's actually a "norlun" that develops but it's def an extension of the trough. Some develop this over the area...some models like it to the west of the area extending down into CVA...and some are weak or nothing.
The ICON shows how we can pad some numbers if this feature works out....