"This service plan reflects that we carried only one-third of normal ridership this morning, and the effects of the heavy snowfall in our service territory," Metro-North said in a statement on its website.
Customers who are able to are urged to travel early before hourly service is put into effect, Metro-North said.
Train times will be available on the interactive schedules webpage.
The commuter rail is already operating on a reduced service as a result of the winter storm with some local and express trains that serve adjacent stations being combined and making additional stops.
Train riders are cautioned to take care when traveling in the snowy and icy conditions and to allow for additional travel time. Also, use caution when entering and exiting trains, and on platforms and staircases.
The snow and ice is a particular problem on the New Haven Line, where overhead catenary wires power the trains.
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