Heat & Severe Weather Coordination Message #4 – Wednesday 7/1/26 Through Saturday 7/4/26 Heat & Severe Weather Potential

Hello to all…

..Isolated strong to severe thunderstorms occurred in portions of interior Massachusetts mid-Tuesday PM into early evening. The complex of severe thunderstorms that entered Western Massachusetts and Northwest Connecticut weakened on arrival but did produce isolated pockets of wind damage in Western Massachusetts. A second complex moved through Western Massachusetts and Northwest Connecticut overnight and was non-severe. The WX1BOX Amateur Radio Report Log from Tuesday 6/30/26 is included in this update..
..Intense Heat Wave Will Impact much of Southern New England Wednesday through Saturday. Severe Weather is possible Wednesday PM into early Thursday AM with a lesser threat for later Thursday into Friday as the main action those days will be west of our area but our region cannot be ruled out completely on those days followed by a greater severe weather potential Saturday July 4th..
..Timing any severe weather potential is uncertain and will depend on impulses in the atmosphere, how close those impulses come to Southern New England and how any thunderstorm/convective development the prior day affects the next day’s convective potential..
..An Extreme Heat Warning is in effect through 8 PM Saturday Evening for the entire NWS Norton Coverage Area except Cape Cod and the Islands for Heat Indices up to 115 degrees. A Heat Advisory is in effect from 10 AM Wednesday Morning through 8 PM Saturday Evening for Cape Cod and Marthas Vineyard for heat indices up to 104 degrees. Those working and recreating outside should take frequent breaks in Air Conditioned comfort and drink plenty of liquids. It is noted low temperatures are unlikely to get below 70 degrees and in a fairly large portion of the area may not get below 75 degrees meaning little relief to the heat during overnight hours..
..In addition, the Storm Prediction Center (SPC) has continued Western and North-Central Massachusetts and Northwest Connecticut in a slight risk for severe weather Wednesday PM and Evening through the overnight hours to early Thursday AM for Northwest Connecticut, Western and North Central Massachusetts with marginal risk across the rest of Northern Connecticut and Central Massachusetts. We are currently in general thunderstorm risk for later Thursday into Friday which means a lower but non-zero threat for severe weather on those days with the main action west of our area but will continue to be monitored. Saturday July 4th again has higher severe weather potential..
..Strong to damaging winds, hail, frequent lightning and heavy downpours leading to urban and poor drainage flooding would be the main threats.. Areas outside of the severe weather risk area should also monitor conditions today through Saturday with the greatest risk Wednesday PM into early Thursday AM and Saturday at this time..
..SKYWARN Self-Activation with Amateur Radio-Call Up Nets will monitor any severe weather potential Wednesday and Beyond. Pictures and videos of wind damage, hail, flooding etc. can be sent as a reply to this email, via our Facebook/X/Bluesky feeds or the email address pics@nsradio.org with credit given to the spotter unless otherwise indicated. The next coordination message will be posted on Thursday by 1100 AM..
..Below is the WX1BOX Amateur Radio Log of the Tuesday 6/30/26 severe weather event, Extreme Heat Warning/Heat Advisory Statement, Area Forecast Discussion, Enhanced Hazardous Weather Outlook, SPC Day-1 Convective Outlook and NWS Heat Safety Tips..

WX1BOX Amateur Radio Log – Tuesday 6/30/26:
https://wx1box.org/wp-content/uploads/2026/07/reports_6_30_26.pdf

NWS Boston/Norton Extreme Heat Warning/Heat Advisory Statement:
https://forecast.weather.gov/product.php?site=NWS&issuedby=BOX&product=NPW&format=CI&version=1&glossary=1&highlight=off

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

NWS Heat Safety Tips:
https://www.weather.gov/safety/heat

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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