A rainy day is on tap for the Philadelphia region, with forecasters expecting periods of heavy showers and flooding, especially in areas along the South Jersey coast.

The National Weather Service says rain is likely for most of the day in Philadelphia.

The storm, made up of remnants from Tropical Storm Karen, is expected to hit hardest in shore areas of Delaware and South Jersey, where a coastal flood warning is in effect until 5 p.m.

Widespread tidal and roadway flooding is expected in those areas this afternoon, the weather service says. High tide occurs between noon and 1:30 p.m. and any heavy rain during that time would increase flood risks.

Forecasters say to expect two to four inches of rain, with the highest amounts near the coast.

Gale-force winds are also expected along the coast, with gusts of 40 to 45 mph along the coast and 20-to-35 mph gusts inland.

Some beach erosion is possible from flooding and strong waves.

By 9 a.m., the rain was already causing problems for travelers. Arriving flights at Philadelphia International Airport were facing delays of more than two hours due to the weather, the airport said.

The slow-moving storm means rainy, windy conditions are expected along the coast until at least Friday, and rain could persist in Philadelphia through the weekend.

The weather service says more showers are expected in the city Friday, but there's just a 50-percent chance of rain Saturday and 40-percent chance Sunday.