[Weather] [2019.12.13 PM] NWS Boston EM Briefing: Heavy rain late tonight & Saturday, Strong winds Saturday

[BOX Operations - NOAA Service Account]

Good afternoon,

Heavy rainfall is still forecast to impact the region late tonight through
Saturday. A Flood Watch is in effect for central and eastern areas where
the heaviest rainfall is expected.

There is cold air in place across the higher inland terrain as well as the
Connecticut Valley, so we could see the precipitation start as light
freezing rain and/or drizzle, which may cause a thin glaze of ice on
untreated roads during this evening's commute. A Winter Weather Advisory is
in effect for these areas till 10pm.

Gusty winds will move in across the region Saturday, strongest across Cape
Cod and the islands. Details below:

*Interior Light Icing:*
*Locations*: Across the east slopes of the Berkshires and the Connecticut
River Valley in Massachusetts.
*Timing:* May see freezing drizzle and/or light freezing rain develop as
the precipitation starts late this afternoon. Temperatures will slowly rise
tonight, so should see the changeover to rain by midnight.
*Amounts*: Trace amounts to a couple hundredths of an inch resulting in a
light, thin glaze of ice.
*Impact*: Slick roads impacting travel during the evening commute through
about midnight.
*Confidence:* Low. Expect patchy coverage of freezing drizzle and light
freezing rain.

*Heavy Rain:*
*Changed*: Increased rainfall total slightly, especially in CT and Central
MA
*Locations*: All locations. Particular rivers at risk include: Pawcatuck
River at Westerly and Wood River Junction, Pawtuxet River at Cranston,
Taunton River at Bridgewater, Wood River at Hope Valley, and Assabet River
at Maynard.
*Timing:* Late tonight into Saturday evening. Heaviest rain from after
midnight tonight through midday Saturday.
*Amounts*: 1 to 2 inches across Western MA. 2 to 2.5 inches across northern
CT and RI as well as central and eastern MA. May see local amounts up to
around 3 inches.
*Impact*: Combination of snow melt and heavy rain may result in localized
flooding.
*Confidence:* High.

*Strong Winds:*
*Locations*: Cape Cod, Nantucket and Martha's Vineyard.
*Timing*: From 8 AM through 4 PM on Saturday.
*Wind Speeds*: South winds 15 to 30 mph with gusts up to 50 mph.
*Impact*: Tree limbs may be blown down, a few power outages are possible.
Unsecured objects may be blown around.
*Confidence*: High.

Please see the attached graphics for the various headlines, the forecast
rainfall total and maximum wind gusts. 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:

Meteorologists: Rodney Chai and Bryce Williams

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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