Passengers disembark a 7 Train that witnesses said had been stuck for more than an hour and a half at Queensboro Plaza. View Full Caption DNAinfo/Jeanmarie Evelly

NEW YORK CITY — A winter storm that pummeled the Big Apple with snow and then rain and ice Monday wreaked havoc on mass transit around the city, including shutting down the entire 7 line for hours.

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Subway and Bus:

As of 4 p.m., there were delays or service changes on several subway lines, although the MTA could not say if the problems were weather-related.

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The MTA said that trains would be stored on express tracks, so by 8 p.m. all trains will be running local. All express buses and most local buses are running as usual.

The MTA also said it expected normal service for the morning commute Tuesday.

In the wake of the 7 train shutdown, which started around 9 a.m., the agency advised riders to use the E, F, R, N and Q trains instead, as well as the Q32 and Q60 buses.

Limited service was restored on the 7 line between 74th Street and Flushing as of Monday afternoon, the MTA said. Shuttle buses were running between the Vernon Boulevard and 74th Street stops.

The Long Island Rail Road was cross-honoring fares at Hunters Point, Willets, Woodside and Flushing, though cancelations were possible for the evening commute.

Because of a signal issue at Queensboro Plaza, there were delays on Astoria-bound N trains, according to the MTA.

And the MTA was running shuttle buses between Queensboro Plaza and Flushing-Main Street.

The agency said to expect delays in bus service due to the weather. The changes affected all lines.

Long Island Rail Road:

By mid-afternoon, several LIRR trains were canceled and the MTA warned commuters to expect more cancelations.

A spokeswoman for the LIRR, urged commuters to head home as early as possible and to expect delays on trains that were still running.

"Employees are working to clear switches and we are operating work trains that apply antifreeze to the third rail and patrol trains with scraper shoes to help reduce the icing," the MTA said in a statement.

Metro-North:

Two of the lines, the Pascack Valley and Port Jervis lines, had 10-15 minute delays due to icing.