[Weather] [2020-04-17 AM] NWS Boston EM Briefing: Expected Snowfall Tonight into Saturday Morning

[BOX Operations - NOAA Service Account]

Good morning,

Following is an updated weather briefing for a late-season accumulating
snowfall expected tonight into Saturday morning across much of interior
Southern New England and into eastern MA.

*Changes with this update:*

   - *Winter Weather Advisory Issued for:*
      - *East Slopes of the Berkshires: *7 PM Tonight to Noon Saturday*.*
      - *Northern CT, Northern Providence County RI, and western & central
      MA:* 11 PM Tonight to Noon Saturday.
      - *Eastern/Northeastern MA (including Boston and the North Shore of
      MA):* 2 AM to Noon Saturday.


*Details:*
Light rain will develop across western MA late today, spreading eastward
and mixing with/changing to snow tonight. The steadiest of the snow,
potentially heavy with low visibility, is expected to fall during the
overnight hours from the border of MA and CT/RI on northward towards the
Mass Pike and Route 2. Snow wraps up later Saturday morning before turning
back over to light rain showers. Mainly rain is expected for the entire
event from southeast MA into central/southern RI.

*What:* Accumulation of wet/heavy snow. Generally 2 to 4" for northern CT,
northwest RI into eastern MA, 4-6" across Worcester County, and 4-6"
(locally up to 8") for the Berkshires.

*Where:* Most of Massachusetts, northern Connecticut, northwestern Rhode
Island.

*When:* Rain changes over to snow from west to east after 8 p.m. and
continues until late Saturday morning. Period of greatest impact is
overnight tonight due to heavy wet snow reducing visibility. Snowfall rates
may be at or near 1" per hour in this overnight timeframe.

*Impacts:*

   - Heavy/wet snow may lead to power outages and tree/limb damage [where
   more than 4 inches of snowfall occurs]. Greatest potential for this
   includes the terrain in northern Worcester County and across the Berkshires.
   - Slushy/icy untreated surfaces and secondary roads across higher
   terrain.

*Confidence: *We are most confident in snowfall totals along and north of
the Mass Pike and at elevations above 1000 ft. There is some uncertainty
with the snowfall totals in northern CT, northwest RI and eastern MA
with temperatures being just above freezing and snow mixing with rain at
times, and snowfall totals could end up lower than currently forecasted.

Attached graphics include the current Winter Weather Advisory areas, the
latest official snow forecast, and the chances of receiving 2 or more
inches and 6 or more inches of snow.

**Note:* Please consider the snow accumulation as *preliminary* and are
subject to further adjustments.

Thank You!

Meteorologists: Matt Belk and Andrew Loconto

If you have any questions or would like more information, don't hesitate to
contact us via this email address, on NWSChat <https://nwschat.weather.gov/>,
or at the following:

National Weather Service Boston/Norton, MA
46 Commerce Way
Norton, MA 02766
508.622.3280
Website <http://www.weather.gov/boston> | Facebook
<http://www.facebook.com/NWSBoston> | Twitter
<http://www.twitter.com/NWSBoston>
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