Good afternoon.

This is our latest update on the potential for weather related hazards that will affect the region from late tonight through early Monday morning.  Low pressure will develop off the New Jersey coast tonigh.  This low will track across south coastal New England Sunday, then push to the Gulf of Maine Sunday evening. 

Changes with this update:
  • Winter Weather Advisory for the east slopes of the Berkshires and higher terrain of the Worcester Hills: In effect from 2 AM Sunday through 8 AM Sunday. 
  • Wind Advisory for Cape Ann, eastern Plymouth county, Cape Cod, Nantucket and Martha's Vineyard: In effect from 5 PM Sunday to 4 AM Monday.
  • Gale Warnings for the Coastal Waters, except Boston Harbor and Narragansett Bay:  In effect from 9 AM Sunday through 6 AM Monday.
  • Small Craft Advisories for Boston Harbor and Narragansett Bay: In effect from 7 AM Sunday through 6 AM Monday. 
DETAILS: 

Light Icing and Light Snow across portions of interior Massachusetts:
Locations: The high terrain of the Worcester Hills and the east slopes of the Berkshires.
Timing: The precipitation will start as light freezing rain during the pre-dawn hours Sunday morning, changing to rain by mid morning. Expect the rain to change back to light snow from mid to late afternoon Sunday, then ending before midnight.
Expected Amounts: A light glaze of ice (up to 1/10"), with up to 2 inches of snow at the highest elevations of western Franklin and western Hampshire counties. 
Impact: Slippery travel.  

Splashover: Sunday Morning High Tide
Locations:  Eastern Massachusetts coast including Martha's Vineyard and Nantucket 
Timing: Sunday morning high tide (5:41 AM at Providence, 8:45 AM at Boston, and 9:46 AM on Nantucket)
Storm Surge: 1.0 to 1.5 feet 
Impact: Some vulnerable shoreline roads, such as Morrissey Boulevard, may experience splashover around high tide. Significant impacts are not anticipated.

Splashover: Sunday Evening High Tide
Timing:  9:17 PM at Boston and 10:24 PM on Nantucket
Although the wind will be strong during the time of the Sunday evening high tide, winds will be from the northwest and that tide will be astronomically lower. So, minor coastal flooding is not expected at this time, though brief splashover can not be ruled out.  

Marine Impacts: Gale Force Winds (Sunday and Sunday Night)
Locations: Massachusetts and Rhode Island coastal & offshore waters. 
Wind Gusts and Timing: East to southeast wind gusts up to 35 kt Sunday morning, then northwest wind gusting up to 35 to 45 knots, peaking late Sunday into Sunday night.
Seas: 4 to 6 feet on the inner bays and sounds; and 7 to 11 ft offshore.
Impact: Hazardous conditions for mariners.

Please see the attached graphics for more details on these hazards.  Thank you. 

Eleanor Vallier-Talbot

If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat, or at the following:

National Weather Service Boston/Norton, MA
46 Commerce Way
Norton, MA 02766
508.622.3280
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