A major nor'easter for Sunday night on the 5th anniversary of Superstorm Sandy. Moisture and energy from the tropics will race up the coast and merge with a strong upper level trough. The surface low pressure system will rapidly intensify, creating very heavy rain, as well as strong winds. Rainfall amounts of 4 to 8 inches are possible upstate and 2 to 4 inches on Long Island. The strong winds would likely be east of the center, so Cape Cod may see 70 mph wind gusts. For Long Island, the rain would be approximately from Noon to midnight on Sunday, with the heaviest rain from approximately 4 PM to 10 PM. The timing and amounts are only approximate for now. Nice weather for Halloween with temps in the 50's.
The following image from the GFS model is for 8 PM Sunday:
Image from tropicaltidbits.com