A period of heavy rain early Monday could lead to ponding of water in poor drainage areas.

The National Weather Service says heavy rain could linger into the beginning of the Monday morning rush hour.

A coastal storm will impact the area Wednesday and Wednesday night.

A substantial accumulation is expected and will affect Thanksgiving travel.

Amounts will be updated throughout the week.

The forecast:

Tonight: Periods of rain, mainly after 11pm. The rain could be heavy at times. Patchy fog after 1am. Low around 44. Light southeast wind increasing to 8 to 13 mph in the evening. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Monday: Showers likely, mainly before 7am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 66. South wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Monday Night: A chance of showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 40. West wind 9 to 14 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Tuesday: Mostly sunny, with a high near 49. West wind 10 to 15 mph, with gusts as high as 25 mph.

Tuesday Night: Mostly cloudy, with a low around 31. West wind 5 to 7 mph.

Wednesday: Snow, mainly after 10am. High near 37. Chance of precipitation is 100%.

Wednesday Night: Snow, mainly before midnight. Low around 28. Chance of precipitation is 90%.

Thanksgiving Day: Partly sunny, with a high near 38.

Thursday Night: Mostly cloudy, with a low around 19.

Friday: Mostly sunny, with a high near 33.

Friday Night: Mostly cloudy, with a low around 22.

Saturday: Partly sunny, with a high near 35.

Saturday Night: Mostly cloudy, with a low around 24.

Sunday: Partly sunny, with a high near 37.