[Weather] [2020-03-21 PM] NWS Boston EM Briefing for Coastal Storm Monday into Tuesday Morning

[BOX Operations - NOAA Service Account]

Good afternoon everyone,

A coastal storm will pass southeast of New England Late Monday into
Tuesday, initially bringing snow to much of the area Monday afternoon
before a change to rain Monday night.

The key takeaway is this is expected to be a minor snowfall event, with the
exception of  the higher elevations of western and central Massachusetts,
where as much as 6 inches of snow is possible.

Please see the attached graphics which include:

   - NWS Official Snowfall Forecast
   - Approximate onset time of accumulating snow (note areas in gray will
   have rain)
   - Chances of receiving 2 inches, 4 inches, or 6 inches or more of snow.

Here are the details:

*What/Where/When:*

   - Snow develops across much of southern New England Monday afternoon,
   except near the South Coast, Cape Cod, and the Islands where mainly rain is
   expected.
   - Snow should be briefly heavy late Monday afternoon and early Monday
   evening before changing to rain from south to north. Only the higher
   elevations of northern Worcester County and near the Berkshires are
   expected to remain all snow.
   - Accumulations of a slushy inch or two are expected in the Providence
   and Boston areas,  2-4" in the Hartford/Springfield area and near the I-495
   corridor in northeast Massachusetts, and 3-6" in the higher elevations near
   the Berkshires and in northern Worcester County, where a few locations
   could see as much as 7".
   - The consistency of the snow will be heavy and wet in all areas.


*Uncertainty:*

   - If the coastal storm passes farther offshore, snowfall totals will be
   much less, especially across the interior.
   - Conversely, if the storm tracks closer to southern New England, there
   would be less snow across most of the region, since the higher
   accumulations would shift to the northwest of Massachusetts.


*Headlines:*

   - Right now due to uncertainty in the storm's track, we are not planning
   to issue any Winter Weather Advisories at this time. However, winter
   weather headlines may be issued in later forecasts once the track of the
   storm becomes more certain.

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

Thanks,
Joe DelliCarpini and Andrew Loconto

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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