A major winter storm is forecast to impact all of southern New England starting tonight and lasting until Tuesday evening. The following forecast is based on a blend of the GFS and NAM models:
Tonight: Light snow spreading slowly from southwest to northeast across the state between 11:00 PM and 4:00 AM. The snow is forecast to remain light overnight (snowfall rates around ¼” per hour) with low temperatures in the teens.
Monday Morning: Light snow around daybreak is forecast to become moderate by mid morning and then heavy at times by noon with snowfall rates approaching 1” per hour. A minor impact is expected for the morning rush hour with a light coating of snow on most roads. The impact may become moderate by noon. Temps rising from the low to mid 20’s.
Monday Afternoon: Heavy snow (snowfall rates up to 1” - 2” per hour) with highs in the upper 20’s. Even heavier snow is possible if any persistent bands set up inside the dashed line on the snowfall map. Northeast winds gusting up to 55 MPH at times by late afternoon may cause whiteout conditions and some scattered power outages. A major impact is likely for the afternoon rush hour with several inches of snow on roads and heavy snow falling. Minor coastal flooding (tides 1 – 2 feet above normal) is also possible during high tide around 1:00 PM in western Long Island Sound.
Monday Night: Heavy snow during the evening should taper off to light snow by midnight and change over to a mix of snow/sleet and rain in southeastern CT. Northeast winds gusting up to 50 MPH at times may cause some additional scattered power outages. Temps holding in the low to mid 30’s. Moderate coastal flooding (tides 2 – 3 feet above normal) is possible during high tide around 1:30 AM in western Long Island Sound.
Tuesday: A light mix of precipitation in the morning should change back to light snow Tuesday afternoon before ending Tuesday night. A moderate impact is expected for the morning rush hour and a minor impact is expected for the afternoon rush hour.
Total Snowfall: Is currently forecast to range from 8” – 12” in southeastern CT, 12” – 18” across the rest of the state and perhaps over 18” if any heavy banding occurs.