The National Weather Service has issued a winter weather advisory for southern Fairfield County, northeast New Jersey and southern Westchester from now through Tuesday morning at 7 a.m.

There will be two parts to the winter storm. A wintry mix this afternoon will turn to leave to rain over Sunday night. Rain will turn back into snow Monday through Monday night.

Plan on slippery road conditions which could affect holiday travel and Monday morning’s commute.

A coastal flood advisory is also in effect from 1 a.m. to 5 a.m. during times of high tide. One to two feet of inundation above ground level are possible in low lying, vulnerable areas. There is a low threat of property damage. Shallow flooding is expected in the most vulnerable locations near the waterfront and shoreline. Some roads and low lying properties including parking lots, parks, lawns, and homes and businesses with basements near the waterfront will experience shallow flooding.

A Coastal Flood Advisory indicates that onshore winds and tideswill combine to generate flooding of low areas along the shore.

The full forecast:

Sunday afternoon

Snow, freezing rain, and sleet before 4pm, then rain and sleet. High near 37. Wind chill values between 20 and 25. East wind 11 to 15 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. Total daytime snow and sleet accumulation of less than one inch possible.

Sunday night

Rain. Low around 36. Wind chill values between 25 and 30. Breezy, with a northeast wind 21 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Monday

Rain before 3 p.m, then rain and snow. Temperature falling to around 34 by 5 p.m. Wind chill values between 25 and 30. North wind 15 to 17 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Monday Night

Snow. Low around 30. Wind chill values between 20 and 25. North wind around 16 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Tuesday

Snow likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 38. Northwest wind 13 to 15 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Tuesday Night

Partly cloudy, with a low around 30.