Severe Weather Coordination Message #1 – Wednesday PM/Evening 8/13/25 Severe Weather/Flood Potential
Hello to all…
..A cold front will approach Southern New England Wednesday 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..
..The Storm Prediction Center (SPC) has placed much of Southern New England in a marginal risk for severe weather from roughly the I-95 corridor north and west in Massachusetts, much of Rhode Island and Connecticut. Timeframe for severe weather is between 2-10 PM ET Wednesday..
..Another round of thunderstorms with a second cold front Thursday Afternoon and Evening may produce heavy rainfall and potential urban and floor drainage flooding in portions of Eastern New England. The severe weather potential for Thursday is low at this time..
..SKYWARN Self-Activation with Amateur Radio Call-Up Nets are possible to likely for Wednesday Afternoon and Evening. SKYWARN Activation with Amateur Radio Call-Up Nets are also possible Thursday Afternoon/Evening for heavy rainfall/flood potential. 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..
One more day of heat and humidity before a cold front moves into the area Wednesday Afternoon and Evening with a second cold front moving over Southern New England Thursday Afternoon and Evening. The headlines depict the current thinking. Key factors include:
1.) The timing of the cold front into the area near the time of peak heating to take advantage of high instability despite weak wind shear profiles.
2.) Frontal forcing and instability to offset weaker wind wind shear and a few other unfavorable severe weather parameters.
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 possible to likely for Wednesday Afternoon and Evening. SKYWARN Activation with Amateur Radio Call-Up Nets are also possible Thursday Afternoon/Evening for heavy rainfall/flood potential. 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. This will be the only coordination message on the Wednesday severe weather potential and a coordination message on the Thursday PM/Evening heavy rainfall/flash flood potential will be posted either Wednesday Evening before 11 PM or Thursday Morning before 11 AM. Below is the NWS Boston/Norton Area Forecast Discussion, Enhanced Hazardous Weather Outlook and SPC Day-1 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-1 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/day1otlk.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
https://ares.ema.arrl.org
https://www.wx1box.org
Like us on Facebook – https://www.facebook.com/wx1box
Follow us on Twitter – https://twitter.com/wx1box
Subscribe on YouTube – https://www.youtube.com/@wx1box-nwsboston-amateur-radio