New Year's Eve Rainstorm In MA: See Timing, Intensity

MASSACHUSETTS — There will be an unwanted guest at New Year's Eve festivities across Massachusetts this weekend: heavy rain.

Delightfully warm weather over the New Year's weekend will be tempered by rain, heavy at times, right during the peak of new year celebrations, according to the National Weather Service. There's a 100 percent chance of rain between 6 p.m. and midnight across all parts of the state.

"First half of Saturday will feature increasing cloudiness and mild temperatures in the 50s. By mid to late afternoon, a modest short-wave trough advancing from the Midwest will support a period of wet weather through Sunday morning," the weather service said in a Friday forecast. "While forcing with this system is modest, there will be an abnormally high amount of moisture in the atmosphere to support substantial precipitation, especially over the southeastern areas."

Temperatures will top out in the low 50s on Saturday, part of a longer warming trend that will peak Wednesday with temperatures near 60 in the Boston area.

Here's the New Year's weekend forecast for parts of Massachusetts:

Boston

Saturday: A chance of rain, mainly after 5pm. Increasing clouds, with a high near 55. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Saturday Night: Rain, mainly after 8pm. Patchy fog. Low around 52. South wind around 7 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

New Year's Day: Rain likely, mainly before 10am. Patchy fog before noon. Otherwise, mostly sunny, with a high near 54. West wind 7 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

Sunday Night: Partly cloudy, with a low around 36. West wind 8 to 11 mph, with gusts as high as 22 mph.

Worcester

Saturday: A chance of rain, mainly after 4pm. Patchy fog before 2pm, then patchy fog after 3pm. Otherwise, mostly cloudy, with a high near 53. Southwest wind 6 to 9 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Saturday Night: Rain. Patchy fog. Low around 48. South wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

New Year's Day: Rain likely, mainly before 10am. Patchy fog before noon. Otherwise, mostly sunny, with a high near 52. West wind 6 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

Sunday Night: Partly cloudy, with a low around 32. West wind 6 to 9 mph, with gusts as high as 20 mph.

Cape Cod

Saturday: A chance of rain, mainly after noon. Patchy fog before 8am, then patchy fog after 11am. Otherwise, mostly cloudy, with a high near 53. Southwest wind around 8 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday Night: Rain. Patchy fog. Low around 47. South wind around 7 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

New Year's Day: Rain, mainly before 9am. Patchy fog before 1pm. High near 52. West wind 7 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

Sunday Night: Partly cloudy, with a low around 34. West wind 6 to 10 mph, with gusts as high as 21 mph.