MIAMI (CBSMiami/AP) – If you have a flight booked for Monday to somewhere on the eastern seaboard you may want give your airline a call first thing in the morning.

Dozens of flights may be canceled on Monday because of a spring nor’easter which rumbled across the East Coast on Sunday and was expected to strengthen into early Monday.

The storm is atypical for April but not uncommon, said David Stark, a National Weather Service meteorologist in New York City.

With the storm Sunday came a spate of disruptions. Pro baseball games were postponed in New York and Washington. The space shuttle Enterprise’s scheduled arrival in New York City was pushed back. An Earth Day celebration at a park in Virginia Beach, Va., was canceled.

From Philadelphia north through New York City and into southern New England up to 4 inches of rain could fall, with the heaviest downpour expected early Monday. Some higher-elevation areas in the western parts of Pennsylvania and New York and in West Virginia and Ohio could even see snow. Forecasts called for 4 to 12 inches. Flooding is possible in some areas.

The storm’s biggest threat is likely power outages caused by falling trees and limbs bringing down power lines, said meteorologist John Darnley.

In Florida, a woman had to be rescued Saturday night during thunderstorms after disappearing while out on Tampa Bay. She was unfamiliar with her watercraft and also unfamiliar with the bay and got stuck on an island, the state Fish and Wildlife Conservation Commission said. Officers found her soon after she was reported missing, as severe thunderstorms loomed overhead and she frantically called for help.