Metro-North Railroad has resumed limited service on the New Haven Line Tuesday evening leaving a commuter mess between New York and New Haven.
At 6:35 p.m., the raiload said it resumed service but that delays of up to an hour were possible.
Access to Grand Central Terminal is limited to the 42nd Street entrance.
As of 5:30 p.m., Metro-North shut down service on those lines because of the thunderstorms moving through New York and Connecticut.
Customers at the time were being told to avoid Grand Central Terminal where large crowds could be seen filling the main hall.
Amtrak also was forced to suspend service along the popular northeast corridor route between New York and Boston. As of 6:35 p.m., Amtrak said it had restored service at reduced speeds through the area, but warned that customers likely would face residual delays throughout the evening.