Amtrak posted this alert to its website today (3/12) at 12:35pm:
Service Adjustments due to Pending Winter Storm
Monday, March 12, 2018 12:35 PM ET
In anticipation of the approaching winter storm for March 13, 2018, all Northeast Corridor service between Boston - New York - Boston has been cancelled up until 11am tomorrow morning. Northeast corridor service includes the Regional and Acela service. Alternate transportation will not be provided. The weather forecast is being monitored and the operating plan will be reassessed in the morning on March 13, 2018.
Customers with reservations on trains that are being modified will be contacted directly and rescheduled.
Amtrak regrets any inconvenience. This information is correct as of the above time and date. Information is subject to change as conditions warrant.
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To be notified of service disruptions on the Northeast Corridor (including Acela Express, Northeast Regional and other corridor services), follow @AmtrakNEC on Twitter.
I'm currently on 176 WAS–NHV and booked for Springfield Shuttle #476 NHV–HFD. I assume the Shuttle will still run, but will my train run beyond NYP? Scheduled to arrive there at 3:17pm. We're almost to Philly, on time. I haven't been contacted (yet).