Severe Weather Coordination Message #1 – Saturday Afternoon & Evening 9/6/25 Severe Weather Potential
Hello to all…
..A cold front will approach Southern New England Saturday Afternoon and Evening setting the stage for Isolated to Scattered Strong to Severe Thunderstorms with strong to damaging winds, hail, frequent lightning and heavy rainfall leading to urban and poor drainage flooding as the main threats and even an isolated tornado as a secondary threat..
..The Storm Prediction Center (SPC) has placed Northwest, North-Central Connecticut, Western and North-Central Massachusetts in a slight risk for severe weather with a marginal risk of severe weather through Northeast Connecticut, Northwest Rhode Island, south-central and Northeast Massachusetts. Timeframe for severe weather is between 1-10 PM ET Saturday..
..SKYWARN Self-Activation with Amateur Radio Call-Up Nets are likely for Saturday Afternoon and Evening. Pictures and videos of storm damage, hail, and flooding can be sent as a reply to this email, via our WX1BOX Facebook, X and Bluesky feeds or to the email address pics@nsradio.org with credit given to the spotter unless otherwise indicated..
A cold front will approach Southern New England as warm and humid conditions for September cover the region. The headlines depict the current thinking. Key factors include:
1.) The timing of the cold front and frontal forcing into the area near the time of peak heating to take advantage of strong wind shear profiles and expected high instability.
2.) Amount of clearing for heating and destabilization to produce the expected high instability. Models have a sufficient window of clearing by late Saturday morning to mid-afternoon and this is key to expected severe weather potential.
3.) As always with severe/non-severe thunderstorm events, not all locations will receive a severe/non-severe thunderstorm. They will be isolated to scattered with pockets of wind damage, hail and urban/poor drainage flooding in those isolated to scattered locations.
SKYWARN Self-Activation with Amateur Radio Call-Up Nets are likely for Saturday Afternoon and Evening. Pictures and videos of storm damage, hail, and flooding can be sent as a reply to this email, via our WX1BOX Facebook, X and Bluesky feeds or to the email address pics@nsradio.org with credit given to the spotter unless otherwise indicated. The next coordination message will be posted by 10 AM Saturday Morning. Below is the NWS Boston/Norton Area Forecast Discussion, Enhanced Hazardous Weather Outlook and SPC Day-2 Convective 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 Enhanced Hazardous Weather Outlook:
https://www.weather.gov/erh/ghwo?wfo=box
SPC Day-2 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/archive/2025/day2otlk_20250905_1730.html
Respectfully Submitted,
Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Home Phone #: (508) 994-1875 (After 6 PM)
Home/Data #: (508) 997-4503 (After 6 PM)
Email Address: rmacedo@rcn.com
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