[Weather] [2020.01.17 AM] NWS Boston EM Briefing: Snow Late This Afternoon and Evening

[BOX Operations - NOAA Service Account]

Good morning everyone,

Very little change made to the forecast early this morning, but we did
extend the Winter Weather Advisory further south onto the south coasts of
RI & MA including Cape Cod.  Please see the outline below for more
details.  We also have attached the approximate start/stop times of the
steady snow along with the expected amounts.

*What has changed ...*

   - *Winter Weather Advisories* extended into south coastal MA and RI
   including Cape Cod, where 2-4" of snow is expected before changing over to
   rain before ending.
   - The rest of the forecast is unchanged with Winter Storm
   Warnings/Advisories In Effect for 3 to 7 inches of snow with highest
   amounts expected in western/northern MA. Up to 8 inches of snow is possible
   in parts of the northwest Berkshires.

*Timing ... *

   - Snow overspreads western MA and northern CT  around 3 or 4 PM and
   reaching eastern MA by 5 or 6 PM.
   - Bulk of the accumulating snow begins to taper off between 10 pm and 1
   am from west to east.

*Duration ... *

   - This is a fast moving system so the snow will be limited to roughly a
   3-6 hour window, but will fall moderate to perhaps briefly heavy for a
   short time.
   - Here is an approximate timeline of the steadiest snow/precip -
   * Boston:* 6pm to midnight,* Worcester to Springfield *5 pm to 11 pm,
   *Providence *6 pm to 10 pm,* Hartford* 5 pm to 10 pm.

*Impacts ...*

   - Not a block buster snow event but it will snow moderate to briefly
   heavy for a 3-6 hour window (times above) with snowfall rates up to an inch
   per hour possible during this time.
   - Cold roads will become snow-covered and slippery immediately after the
   snow commences. Travel will be difficult this evening with poor visibility
   too, but improvement expected after midnight.

*Snow Totals ... *

   - Most of MA, RI & CT will receive a quick 3 to 7 inches of snow.
   Higher amounts towards western and northern MA with the lower amounts near
   the south coast and Cape.
   - Snow will end as light rain or drizzle towards midnight across RI/SE
   MA with temps rising above freezing.
   - Snow may ends as a period of light freezing drizzle across portions of
   interior MA and CT towards midnight.  Little additional impact expected
   from that with that falling on top of the earlier snow.

*Forecast Confidence ... *

   - High confidence in several inches of snow falling late today and this
   evening.
   - High confidence that snow sticks to roadways immediately with cold
   ground temperatures.
   - Localized snow banding may result in some locations getting 1 to 2
   inches more or less than what is currently expected, but overall this is a
   rather high confident forecast.

An additional email will be sent late this afternoon.

Thank You

Meteorologist: Hayden Frank

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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