Storm Coordination Message #1 – Sunday Night 12/10/23-Monday Morning 12/11/23 Multi-Hazard Significant Storm

Hello to all…

..Significant Multi-Hazard Storm to impact Southern New England Sunday Night and Monday Morning with the potential for strong to damaging winds, heavy rainfall leading to river/stream/urban flood potential, and the potential for minor to low-end moderate coastal flooding at the time of high tide across portions of South Coastal Rhode Island & Massachusetts..
..A Flood Watch is now in effect for Northern Connecticut and Western Massachusetts from Northern Middlesex and Worcester Counties west from Sunday Afternoon to Monday Evening for 2-3″ of rain with locally higher amounts potentially leading to flooding of small rivers, streams and urbanized areas..
..A High Wind Watch is now in effect for Late Sunday Night into Monday Afternoon for sustained winds of 35-45 MPH with gusts to 65 MPH and isolated higher wind gusts possible. Additional portions of Southern New England could have some wind headlines in future updates. These winds will have the potential to cause scattered pockets of tree and wire damage with scattered power outages possible..
..A Coastal Flood Watch is now in effect from late Sunday Night through Monday Morning for Southeast Providence, Bristol, Eastern Kent, Newport and Washington Counties of Rhode Island for minor to pockets of moderate coastal flooding at the time of high tide along vulnerable shore roads in Southern Rhode Island. Additional coastal flood headlines are possible in future updates..
..SKYWARN Self-Activation with monitoring of Amateur Radio Repeaters is likely late Sunday Night through Monday Morning for reportable criteria on rain gauge reports, rain related flooding, coastal flooding, wind damage and measured wind gusts 40 MPH or Greater..

A significant multi-hazard storm has potential to bring impacts to Southern New England Sunday Night through Monday Morning. The headlines depict the current thinking. Key factors include:

1.) How much winds will be able to mix down to the surface in Cape Cod and the Islands and coastal Southern New England as there are very strong winds aloft.
2.) If a convective line of showers or thunderstorms forms and further supports mixing down of damaging winds to the surface and also enhances heavy rainfall.
3.) The biggest through for any changeover to snow on the back end of the system is in Northern New England but will need to monitor the higher elevations of Northwest and North-Central Massachusetts for any precipitation changeover.
4.) Axis of heavy rainfall and whether it can cause river, stream and/or urban flooding in the Flood Watch area.

SKYWARN Self-Activation with monitoring of Amateur Radio Repeaters is likely late Sunday Night through Monday Morning for reportable criteria on rain gauge reports, rain related flooding, coastal flooding, wind damage and measured wind gusts 40 MPH or Greater. The next coordination message will be posted by 1130 AM Saturday Morning. Below is the NWS Boston/Norton Area Forecast Discussion, Flood Watch Statement, High Wind Watch Statement, Coastal Flood Watch Statement and Enhanced Hazardous Weather Outlook:

NWS Boston/Norton Area Forecast Discussion:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Flood Watch Statement:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=FFA&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton High Wind Watch Statement:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=NPW&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Coastal Flood Watch Statement:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=CFW&format=CI&version=1&glossary=1&highlight=off

NWS Boston/Norton Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box

Respectfully Submitted,

Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875
Home/Data #: (508) 997-4503
Email Address: rmacedo@rcn.com
https://ares.ema.arrl.org
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