MEMA Situational Awareness Statement 6:45 p.m. 02-12-17

Lower snow totals on Cape, more on mainland

Situational Awareness Bulletin from Massachusetts Emergency Management Agency:

Weather Update

MASSACHUSETTS EMERGENCY MANAGEMENT AGENCY
SITUATIONAL AWARENESS STATEMENT 
(Lower Snow Totals for Cape Cod)
DATE: 2/12/2017
TIME: 6:45 PM

SUBJECT: Powerful Winter Storm Today into Monday
Situation
The National Weather Service (NWS) has issued a Winter Storm Warning for the majority Commonwealth (except Cape Cod and the Islands). The Blizzard Watch previously issued for coastal Massachusetts has been cancelled, but a Winter Storm Warning remains in place.

The moderate to heavy snow from the first wave of the storm will in intensity around 7 pm this evening. Light rain or light snow will continue along and Southeast of the Boston to Providence corridor, and light snow in Northwest MA is expected. Additional accumulations after 7 pm through midnight will be light. 
The system associated with the second wave of the storm will develop further northeast than previously forecast, resulting in lower additional snow accumulations (coating to 2 inches additional accumulation in western and central Massachusetts, 2-4 inches of additional accumulation in eastern Massachusetts, and 4-8 inches additional accumulation in northeastern Massachusetts). For this second wave, snow will begin again around midnight and continue through noon on Monday. By daybreak, winds will begin to increase, with 35-50 mph gusts expected across Eastern MA, including Cape Ann, and 45-60 mph gusts across Cape Cod and Nantucket. A High Wind Warning has been issued for much of eastern Massachusetts. 
Monday Morning Commute
There will be impacts to the morning commute, as heaviest periods of snow will occur between 2 – 11 a.m. Blowing and drifting snow is expected with poor visibility (especially in areas north and northeast of Boston).
Total Storm Snowfall:
• 4 to 8 inches South of the Mass Pike
• 6 to 12 inches north of the Mass Pike
• 10 to 15 inches northeastern Massachusetts
Winds
Beginning tomorrow morning around daybreak, there will be strong wind gusts of 35-50 mph across eastern Massachusetts, and gusts of 45-60 mph across the Cape and Nantucket. The winds associated with the wet snow from this afternoon that remains caked on trees and powerlines, brings potential for scattered power outages and downed tree limbs. 
Coastal Flooding
A Coastal Flood Warning will be in effect from 11 am to 4 pm on Monday for the MA east coast from Salisbury to Rockport, Hull to Plymouth, Sandwich to Eastham and Nantucket. Minor to moderate coastal flooding is likely from Salisbury to Rockport, Hull to Plymouth and Nantucket. Tidal departure is 1.5 to 2 feet above normal (Salisbury to Plymouth) and 2 to 3 feet above normal (North and East facing shorelines of Cape Cod and Nantucket). Moderate with pockets of moderate to major coastal flooding is anticipated for the Cape Cod Bay side of Cape Cod from Sandwich to Eastham. Cape Cod Bay communities from Sandwich to Eastham may experience road washouts and damage to vulnerable structures near the shore. Inundation of low lying areas may reach 1 to 3 feet except possibly up to 4 feet in isolated low lying spots between sandwich and Eastham.
Erosion and overwash are likely along much of the ocean exposed MA east coast around the Monday early afternoon high tide. The erosion could be severe in the Plum Island area, North side of Cape Cod (from Sandwich to Eastham), the ocean side of the outer Cape and the East side of Nantucket.


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