From the Massachusetts Emergency Management Agency at 7:50 p.m.:
Powerful Winter Storm Sunday into Monday (Info as of 7 PM on 2/11)
A Winter Storm Warning for the majority of the Commonwealth (except Cape Cod and the Islands). A Blizzard Watch is in effect for Essex County, Eastern Plymouth County, Barnstable County and Nantucket.
Snow will overspread the area Sunday morning and will continue, heavy at times, into the day on Monday, ending during the afternoon and evening hours. The snow will be heavy and wet Sunday afternoon and evening (snowfall rates of 2 to 4 inches per hour possible). On Sunday, especially in Southeast MA, the conditions may mix with sleet, freezing rain or be all rain. Snow will be light and steady late Sunday night through Monday. Snow may linger into early Monday afternoon in Eastern MA.
Heavy snow will make many roads impassable and may produce widespread power outages due to the weight of the snow on tree limbs and power lines. Strong winds will lead to blowing snow, reduced visibility, and additional power outages.
• Berkshires: 10 to 14 inches
• North of the Mass Pike: 12 to 18 inches
• Along and South of the Mass Pike: 6 to 12 inches
• Essex county: 12 to 18 inches
• Southern Bristol and Southern Plymouth counties: 6 to 8 inches
• Coastal Plymouth county: 6 to 10 inches
• Cape Cod: 4 to 8 inches
• Nantucket: 2 to 4 inches
Strong winds most of Monday. Northwesterly winds 35-45 mph developing early Monday morning, tapering off Monday night. Damaging wind gusts 50-65 mph for coastal MA, Cape Cod and the Islands. Blowing and drifting snow will promote reduced visibility 1/4 of a mile or less.
For the Sunday midday high tide (1 to 1.5 feet above normal high tide), minor coastal flooding of vulnerable shore roads is likely. Any inundation of low spots should be less than 1 foot. Minor beach erosion is also possible.
For the Monday early afternoon high tide (1.5 to 2 feet above normal), minor to moderate coastal flooding may occur. More significant beach erosion is possible.
A coastal flood watch is in effect from late Monday morning through Monday afternoon for the MA east coast (Salisbury to Rockport, North side of Cape Cod from Sandwich to Eastham and Nantucket). Minor to moderate coastal flooding is possible Salisbury to Rockport including the Plum Island area as well as Nantucket Harbor. Moderate with pockets of moderate to major coastal flooding is possible from Sandwich to Eastham; where damage to the most vulnerable structures along the immediate shore and shoreline roads is possible due to the combination of storm surge and large breaking waves. Inundation of 1 to 3 feet in low spots is possible.
Large waves of 15 to 20 feet just offshore will likely cause significant erosion of ocean exposed shorelines along Eastern MA. The erosion along the North side of Cape Cod (from Sandwich to Eastham), the ocean side of Cape Cod (from Truro to Chatham) and the East side of Nantucket may be severe in places.
• Snowfall may result in poor visibility and difficult travel Sunday/Monday
• Potential impacts to Monday morning commute
• Power outages with downed limbs and power lines due to the weight of the snow
• Shore roads may become impassable due to coastal flooding around Monday midday high tide
There is still uncertainty in the forecast at this time.
Winter storm preparedness and safety information is available at: mass.gov/mema/snow