[Weather] [2023.07.14 PM] NWS Boston EM Briefing - Excessive Rain & Flooding Tonight, Again on Sunday

[BOX Operations - NOAA Service Account]

Good afternoon,

Following is this afternoon's updated weather briefing regarding rounds of
heavy rain and the related potential for flooding.

There were overall no significant changes. However, with the weekend nearly
upon us and with conditions favoring a potentially substantial amount of
rain forecast for Sunday, we would ask to keep your situation awareness
high for the Sunday and Sunday night timeframe for a renewed potential for
rapid-onset flash flooding, urban and street flooding along with rises on
larger rivers and smaller creeks and streams.

For the rest of today and tonight, after a welcomed break this afternoon,
we expect another round of heavy showers and thunderstorms developing over
eastern New York to move into Connecticut, Massachusetts and Rhode Island
tonight into the overnight. Ground and soil conditions are saturated and
persistent downpours from thunderstorms may trigger flooding.

Saturday looks to offer less rain and thunderstorm chances with anticipated
rain chances appearing to be no worse than scattered.

On Sunday, a slow-moving cold front will be interacting with an exceedingly
humid & moisture-rich air. Multiple rounds of slow-moving showers and
thunderstorms are possible, with a significant Moderate Risk for excessive
rainfall forecast for Sunday. We expect rain to be the heaviest during the
first part of the day in interior sections of Connecticut and
Massachusetts, then anticipated to progress slowly eastward late Sunday
into Sunday night into eastern sections of Massachusetts and Connecticut
and all of Rhode Island. A Flood Watch may be needed again on Sunday and/or
Sunday night.

Attachments to this email include the following:

   - An updated one-page briefing discussing rainfall and flooding
   expectations.
   - Flood Watch Graphic valid through 12:00 AM Saturday.
   - Excessive Rainfall Outlook Graphics valid for both Tonight and for
   Sunday
   - Additional Forecast Rainfall for Tonight
   - Forecast Rainfall for Sunday

Expect an update to this briefing by 600 AM Saturday.

Thank You!

Meteorologists: Andrew Loconto, Kevin Cadima and Matthew Belk

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>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.massupt.org/pipermail/weather/attachments/20230714/b9ff5593/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: July 14 and July 16 excessive rainfall.pdf
Type: application/pdf
Size: 229675 bytes
Desc: not available
URL: <http://lists.massupt.org/pipermail/weather/attachments/20230714/b9ff5593/attachment-0001.pdf>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: SNE-WPC-Day3-ERO-Outlook.png
Type: image/png
Size: 2117914 bytes
Desc: not available
URL: <http://lists.massupt.org/pipermail/weather/attachments/20230714/b9ff5593/attachment-0005.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: SNE-WPC-Day1-ERO-Outlook.png
Type: image/png
Size: 2123341 bytes
Desc: not available
URL: <http://lists.massupt.org/pipermail/weather/attachments/20230714/b9ff5593/attachment-0006.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Flood_Watch.png
Type: image/png
Size: 732970 bytes
Desc: not available
URL: <http://lists.massupt.org/pipermail/weather/attachments/20230714/b9ff5593/attachment-0007.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Rain_Sunday.png
Type: image/png
Size: 733923 bytes
Desc: not available
URL: <http://lists.massupt.org/pipermail/weather/attachments/20230714/b9ff5593/attachment-0008.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Rain_Tonight.png
Type: image/png
Size: 762301 bytes
Desc: not available
URL: <http://lists.massupt.org/pipermail/weather/attachments/20230714/b9ff5593/attachment-0009.png>