[Weather] [2025.12.27 PM] NWS Boston EM Briefing: Freezing Rain Sunday Night to Early Monday

[BOX Operations - NOAA Service Account]

Good afternoon,

A storm system passing to our west Sunday night will produce a period of
freezing rain mainly across interior Southern New England to Interstate 95
before gradually changing over to rain Monday morning.

Icy roads and sidewalks will be the main hazard, with impacts to the
Monday morning commute. However the potential for tree and powerline damage
will also exist in portions of the CT River and Merrimack Valleys, where
ice accretions look to be more significant and coinciding with where
leftover snow from the recent snowstorm is still clinging to trees and
powerlines.

A Winter Weather Advisory has been posted for a large part of
interior Southern New England where confidence is greatest in icing
accumulations. This may need to be expanded eastward into the Boston to
Providence corridor in later updates.

Following supporting attachments include:

   - One-page briefing sheet.
   - Winter Weather Advisory area.
   - Official NWS Storm Total Flat Ice Accretion Forecast***.
   - Exceedance Probabilities for 0.1", 0.25", and 0.5" or more of flat ice
   accretion*.

* *Note*: NWS forecasts horizontal or flat ice accretions. If interested in
radial icing (such as icing accretion occurring around powerline wires or
tree branches), multiply the flat ice forecast values by 0.4.

Expect the next briefing to be sent *by mid-morning Sunday*.

Thank You!

Meteorologists: Andrew Loconto, Frank Nocera and Caity Mensch

If you have any questions or would like more information, please don't
hesitate to contact us. You can reach us via:
email: box.operations at noaa.gov
phone: 508.622.3280
Slack/NWSChat 2.0 <https://nwschatws.slack.com/> (for approved partners)
social media: Website <http://www.weather.gov/boston> | Facebook
<http://www.facebook.com/NWSBoston> | Twitter
<http://www.twitter.com/NWSBoston>
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