More info from the web site, but it doesn't say exactly where the problem occured.
MTA Metro-North Railroad
Hudson Line 10:50 AM
There is no train service between Garrison and Peekskill because of a track condition resulting from the recent extreme weather in that area. Shuttle bus service, however, is available between these two stations. Trains will depart Poughkeepsie and Grand Central at regularly scheduled times. At Garrison, customers can pick up shuttle bus service to Peekskill where they can resume regular train service.
At this time, we anticipate delays of up to one hour or more for customers traveling to or from points between Peekskill and Poughkeepsie.
As an alternative, you may want to drive to our Croton-Harmon Station?where parking restrictions have been relaxed?to pick up regular train service. For driving directions you can go to our Stations Section and select the Croton-Harmon page.
We anticipate that full train service will not be restored for the PM Peak period and shuttle bus service will be in effect. Hudson Line customers can expect extensive delays and crowding. If possible, we suggest that customers consider taking Harlem Line trains to stations nearby their destinations and make arrangements to be picked up. Hudson Line tickets will be accepted on the Harlem Line.