Heat & Severe Weather Coordination Message #3 – Tuesday 6/30/26 Through Saturday 7/4/26 Heat & Severe Weather Potential

Hello to all…

..Intense Heat Wave Will Impact much of Southern New England Wednesday through Saturday. Severe Weather is possible any time late Tuesday PM to Saturday. Greatest risk days in the short-term look to be later Tuesday PM and Evening and Wednesday PM and Evening followed by Friday and Saturday at this time..
..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 Excessive Heat Warning is now in effect from 10 AM Wednesday Morning through 8 PM Saturday Evening for the entire NWS Norton Coverage Area except Cape Cod and the Islands for Heat Indices up to 112 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 issued a Severe Thunderstorm Watch until 8 PM for Berkshire County Massachusetts and continued a marginal risk for severe weather Tuesday PM and Evening for Western and North-Central Massachusetts and Northwest Connecticut and a slight risk for severe weather Wednesday PM and Evening for Northwest Connecticut, Western and North Central Massachusetts with marginal risk across the rest of Northern Connecticut and Central Massachusetts.
..Strong to damaging winds, hail, frequent lightning and heavy downpours leading to urban and poor drainage flooding would be the main threats. The threat will depend on impulses in their atmosphere and their track into the severe weather risk areas. For Tuesday, the current complex doing significant wind damage in Northeast New York presuming it holds together appears to be on a trajectory to impact portions of Western Massachusetts after 5-6 PM though the track could change and will bear close watching.
..Areas outside of the severe weather risk area should also monitor with additional severe weather chances possible Wednesday right through Saturday July 4th and that will be detailed in future coordination messages..
..SKYWARN Self-Activation with Amateur Radio-Call Up Nets will monitor any severe weather potential Tuesday, Wednesday and Beyond. In the interest of time, this is a shortened updated coordination message..
..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 Wednesday by 100 PM as we are in a monitoring mode for the complex in Northeast New York.
..Below is the Excessive Heat Warning/Heat Advisory Statement, Area Forecast Discussion, Enhanced Hazardous Weather Outlook, SPC Day-1 and Day-2 Convective Outlooks and Heat Safety Tips..

NWS Boston/Norton Excessive 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

SPC Day-2 Convective Outlook:
https://www.spc.noaa.gov/products/outlook/archive/2026/day2otlk_20260630_1730.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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