Update from Massachusetts Emergency Management Agency at 1 p.m. Sunday, January 22nd:
Strong Coastal Storm Monday into Tuesday (Info as of 1PM on 1/22/17)
A strong coastal storm is expected to impact the state Monday afternoon into Tuesday morning. The storm is forecast to produce significant amounts of precipitation (rain, snow/sleet and snow) and strong winds. The precipitation will include rain, and may also include snow, sleet and/or freezing rain. The types of and amounts of precipitation may vary depending on the final track of the storm.
WIND: Easterly winds will be strongest between 4:00 PM on Monday and 2:00 AM Tuesday. The strongest winds will over the Outer Cape and Islands where gusts may be 60-70 MPH. Across the rest of eastern Massachusetts, gusts may reach 45-55 MPH. Inland, wind gusts may be 30 to 40 MPH. Particularly along the coast and eastern Massachusetts, and in areas that may receive heavy wet snow, the strong winds may cause tree damage and power outages.
PRECIPITATION: Heavy rain is forecast starting Monday and lasting into Monday night or early Tuesday morning. 2-3 inches of rain is possible across eastern Massachusetts with some areas potentially receiving more. Localized flooding in urban and poor drainage areas is possible. River flooding is not likely. Depending on the track of the storm and temperatures, western and northwestern MA and higher terrain of central Massachusetts may receive snow and/or a period of freezing rain/sleet. Snowfall totals likely will be less than 6”. Ice accretion should be less than one-quarter of an inch. Travel in areas that receive snow, sleet and/or freezing rain may be difficult, particularly on untreated roads. Snow may be wet and heavy which, in combination with strong winds, may cause tree damage and power outages.
COASTAL FLOODING: Up to 2-3 feet of storm surge is possible Monday night, with lower surge values possible Tuesday morning as the strong winds subside. Minor, with isolated instances of moderate, coastal flooding is possible along the east coast of Massachusetts during the Monday night and Tuesday morning high tides. Splashover is likely and inundation of vulnerable coastal roads may occur. Note that these impacts are based on the timing of the storm’s arrival in New England according to the current forecast; a change in timing of as little as 6 to 12 hours could significantly impact the coastal flooding threat.
Tips for preparing for coastal storms are available on MEMA’s website at: http://www.mass.gov/…/agen…/mema/emergencies/coastal-storms/
Download the free Massachusetts Alerts app to receive emergency notifications and information from the Massachusetts Emergency Management Agency and the National Weather Service: www.mass.gov/mema/mobileapp.
Graphics via US National Weather Service Boston MA