Governor Chris Christie advises residents to "stay off roads in North Jersey" in a tweet Saturday afternoon:

Please stay off roads in North Jersey. Wet snow is causing downed trees & power lines. EVERY PIECE OF DOT EQUIPMENT is out clearing roads.

 
4pm radar shows snow in every New Jersey county except Atlantic and Cape May. Trees down blocking roads and bringing down powerlines in Central and North Jersey. Over 100,000 central and north residents are without power.
Heaviest outages are in Morristown, Flemington, Lambertville, Chatham, Denville, Florham Park and surrouding areas.

Get NJ traffic updates every 15 minutes for more details. http://nj1015.com/listen-live/