[Weather] [2020.02.12 AM] NWS Boston EM Briefing For Wintry Mix Late Tonight Into Thursday AM Commute

[BOX Operations - NOAA Service Account]

Good morning everyone,

We continue to forecast a wintry mix that will impact parts of our region
during part of the Thursday morning commute.  This will not be a big storm,
but given the timing there will be some impacts mainly northwest of a Boston
 to Providence to Hartford line. Not much has changed with our forecast for
this storm, but a *Winter Weather Advisory* has been issued from *11 PM
this evening through 9 am Thursday (continues through noon Thursday for
northern Massachusetts).*

*WHAT/WHERE:*
- Ptype may begin as a brief period of snow/sleet near the Boston to
Providence to Hartford corridor, but a quick change to rain should occur
with any impact being rather limited. Any snow/sleet accums should be less
than an inch.
- Further northwest into the Hills of northern CT, as well as southwest and
south central MA a coating to 2 inches of snow and sleet is expected. A
period of light freezing rain may follow with up to one tenth of an inch of
ice accretion possible mainly in the high terrain.
- Greatest impact is expected across far northern MA, especially near the
NH border where 2 to 4 inches of snow is possible with isolated 5 to 6 inch
amounts not out of the question in extreme northwest MA.  Light ice
accretion up to one tenth of an inch may follow.

*WHEN:*
*-* Precipitation overspreads the region between 11 PM and 3 AM Thursday
from west to east. Any snow/sleet will then change to rain near the Boston
to Providence to Hartford corridor.
- Further northwest the threat for accumulating snow will be through 6 or 7
AM Thursday, before precipitation changes to sleet,freezing rain and rain.
Brief 1 inch per snowfall rates possible north of Route 2 in far northern
MA through 7 AM Thursday.
- Light ice accretion may follow through mid morning Thursday, mainly in
the higher terrain with up to one tenth of an inch of ice accretion
possible. Elsewhere, mainly rain is expected after 7 or 8 AM Thursday.
- Ideally locations should have changed to rain by Thursday afternoon with
temps above freezing, however there remains some uncertainty whether things
will ever chance to rain along the New Hampshire border.

*POTENTIAL IMPACTS:*
*- *The main concern is northwest of the Boston to Providence to Hartford
corridor, where a wintry mix will impact part of the Thursday AM commute.
Any snow/sleet accums should be a coating to 2 inches, but some light ice
accretion may follow especially in the high terrain.
- Greatest risk for a plowable snowfall will be north of Route 2 in
Massachusetts, where 2 to 4 inches of snow may accumulate and perhaps
isolated 5 to 6 inch amounts in extreme northwest Massachusetts.
-* The greatest impacts will likely be across far northern Massachusetts
where a plowable is possible. A brief period of 1 inch per hour snowfall
rates is possible during part of the Thursday morning commute.*

Please let us know if you have any questions or concerns!

Thank You

Meteorologist: Bryce Williams


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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