From the Massachusetts Emergency Management Agency:
Information from MEMA and the National Weather Service regarding storms expected this weekend:
MASSACHUSETTS EMERGENCY MANAGEMENT AGENCY
SITUATIONAL AWARENESS STATEMENT
January 17, 2019
Below and attached is this morning’s forecast from the National Weather Service for two storms that will impact the state over the next three days.
The first storm is forecast to impact the state tomorrow (Friday); The second, larger storm, is forecast for Saturday night and Sunday. Forecast confidence remains low for the amount of snow, but areas to the north of the Massachusetts Turnpike and I-95 corridor may receive 1’ to 2’ of snow.
Southern parts of the state may see a transition from snow to rain, and an area in between may see periods of sleet and freezing rain with the potential for significant accumulations of ice. Confidence in the track of the storm and its impacts should increase by later today.
The second storm will be followed by a flash freeze and frigid temperatures. MEMA will disseminate the next Situational Awareness Statement this afternoon, and will continue to issue Statements as the week proceeds and confidence in the track, timing and impacts increase, particularly with respect to the second storm.
From the National Weather Service:
We continue to monitor two winter systems, one for early Friday, the other for the weekend. Note that the single snowfall forecast attached to this email is for the Friday morning system only. The full set of briefing slides is for the weekend storm.
· Light snow begins between 1 AM and 7 AM Friday, impacting the commute for most of Southern New England.
· Snowfall rates of less than 1 inch/hour are expected, with accumulations up to 2 inches across western MA, decreasing closer to the coastlines. (See attached snowfall map)
· Snow changes to rain, especially across the coastal plain of MA/RI during the afternoon.
· Some untreated road surfaces may be covered.
Saturday night - Sunday night:
See the slides attached to this email. Heavy snow changing to an icy mix and then to rain, mainly across the southeast, is expected, along with a risk for strong winds, inland and coastal flooding. This storm is likely to be followed by a flash freeze beginning late day Sunday into Sunday night, with bitter cold air into Monday.
Be aware, the snowfall totals for the weekend storm are likely to evolve over the next couple of days. Note the rather large range in accumulation between the best and worst case scenarios. These are being provided now as a first look. Sleet accumulation has been added into the "snow" total accumulation.
Overall confidence is high for a moderate to high impact storm, but confidence in exact details and timing remains low at this time. We will continue to update into this weekend.