[Weather] [2020.01.18 1030 AM] NWS Boston EM Briefing: Snow Late This Afternoon and Evening

[BOX Operations - NOAA Service Account]

Good morning everyone,

Here is a late morning update for the storm expected to impact southern New
England later today into late tonight.

*What has changed ...*

   - Looks like we will see the lower end of the snowfall thresholds on the
   expected snowfall map (see attached).
   - Looks like it is going to take a bit longer for snowfall to begin.
   Things should begin approximately 1-2 hours later than previously expected.
      - Snow overspreading western MA and northern CT around 5 to 6 PM and
      reaching eastern MA by 6 or 7 PM.

Everything else remains on track, but for completion sake here is
additional information from the previous email sent out below.

*Timing ... *

   - 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:* 7 pm to midnight,* Worcester to Springfield *6 pm to 11 pm,
   *Providence* 7 pm to 10 pm,* Hartford* 6 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 later this afternoon.

Thank You

Meteorologists: Matt Belk and Bill Leatham

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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