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

[BOX Operations - NOAA Service Account]

Good morning.

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

Cold air in place across the higher inland terrain as well as the
Connecticut Valley, so 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.

Once the low pressure area that is causing the rain and potential slippery
travel conditions today, gusty winds will move in across the region
Saturday, strongest across Cape Cod and the islands.

*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:*
*Locations*: All locations.
*Timing:* Late tonight into Saturday evening. Heaviest rain from after
midnight tonight through midday Saturday.
*Amounts*: 1 to 2 inches across Western MA and CT. 2 to 2.5 inches across
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, especially in areas with poor drainage.
*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 flood watch, the forecast rainfall
total and wind gusts.

Eleanor Vallier-Talbot

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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