Here is the latest from the Metro-North Web site:
To Grand Central:
-Hourly shuttle service between New Haven (departing every 45 minutes after the hour) and Stamford with local train service operating every half hour between Stamford and Grand Central Terminal.
From Grand Central:
-Train service operating every half hour (:04 and :34 after the hour) out of Grand Central making all local stops to Stamford with hourly connections at Stamford for train service to New Haven.
PM Peak Service
From Grand Central to Stamford/New Haven:
-Limited service from Grand Central direct to Stamford with connections to New Haven provided every 20-30 minutes.
-Harlem Line Service to White Plains Station with express bus service to Rye Station for local train service between Rye and Stamford operating every 20-30 minutes
From Grand Central to Harrison:
-Limited train service operating every 30 minutes from Grand Central to New Rochelle, Larchmont, Mamaroneck and Harrison Stations
-Harlem Line train service to Mount Vernon West for Bus Service to Pelham and Mount Vernon East Stations