The News 12 Storm Watch Team is continuing to track a significant winter storm Sunday into Monday. The storm is becoming more likely to cause major impacts on Long Island. In fact, this will likely be our highest single-storm snowfall in four years.

WHAT'S NEW: THIS IS AN OFFICIAL FIRST CALL ON THE SUNDAY SNOW FORECAST FOR LONG ISLAND

ALERTS: A winter storm watch in effect from 3 a.m. Sunday to 6 p.m. Monday. A cold weather advisory is also in effect for Friday night through mid-morning Saturday for wind chills around -10 degrees.

Today: Sun and Clouds, with a high near 45. Breezy. West wind 15 to 30 mph.

Tonight: Partly cloudy, with a low around 26. West wind 5 to 15 mph.

Friday: Sun and Clouds, breezy and colder, with a high near 35. Wind chill values between 20 and 25. West wind 15 to 30 mph.

Friday Night: FRIGID. Partly cloudy, with a low around 9. Wind chill values between -5 and 5. Northwest wind 15 to 25 mph, with gusts as high as 30 mph.

Saturday: Mostly sunny and cold, with a high near 18. Northwest wind 10 to 15 mph.

Saturday Night: Chance of snow towards morning. Mostly cloudy, with a low around 10.

Sunday: Cloudy. Periods of Snow. Snow will be moderate to heavy during the afternoon. Wintry mix possible towards sunset. High near 26.

Sunday Night: Cloudy. Snow, moderate to heavy at times. A wintry mix is possible. Low around 19. Snow totals more than 6 inches with the potential of 12-plus inches.

Monday: Cold. Breezy. Scattered snow showers. Mostly cloudy, with a high near 28.

Monday Night: Partly cloudy, with a low around 11.

Tuesday: Mostly sunny, with a high near 25.

NEWS 12 HAS YOU COVERED! Please check back with our hyperlocal weather updates morning, afternoon and night on-air, on social media and on the News 12 app. The News 12 Storm Watch Team will have frequent weather updates for you with the newest and best information on Sunday's storm.