A cold front dropped through southern New England in the afternoon and evening causing a line of strong storms to move through CT, RI, and southeast MA causing wind damage in each state. Eastern CT also saw hail from quarter to golf ball sized.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOX wrote it up.
A cold front dropped through southern New England in the afternoon and evening causing a line of strong storms to move through CT, RI, and southeast MA causing wind damage in each state. Eastern CT also saw hail from quarter to golf ball sized.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before the first event at Jul 3, 1:51 PM EST, 2 hours 39 minutes earlier.
Area Forecast Discussion National Weather Service Boston/Norton MA 251 PM EDT Thu Jul 3 2025 .SYNOPSIS... Hot temperatures today will likely trigger a round of scattered showers & t-storms between 4 and 10 PM, some of which may be severe. Quiet for Independence Day heading into the weekend, then heat and humidity kick up for Sunday and the start of next week. Unsettled weather may make a return Tuesday into Wednesday. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... Key Messages... * Severe Thunderstorm Watch in effect for all of CT, RI, and MA (excluding the Cape & Islands). * Hot and muggy this afternoon ahead of the main line of thunderstorms. Temperatures keep climbing this afternoon, well into the upper 80s and even into the low 90s in some areas. Already seen some early morning convection across northern MA, and expecting another round of storms to develop later this afternoon in western MA/northern CT. A low over Quebec is moving SE into New Brunswick, pushing a cold front across New England this afternoon. The cold front combined with a neutrally tilted mid- level shortwave will provide plenty of forcing for thunderstorms development. Dewpoints are in the 60s and PWATs are in the 1.25"-1.5" range this afternoon, so plenty of moisture. MUCAPE remains near 1500 J/kg and mid-level lapse rates are also remaining around 6.5 C/km. Given the relative strength of the ingredients and how the morning has behaved, felt confident collaborating with SPC to put out a Severe Thunderstorm Watch for all of CT, RI, and MA (excluding the Cape and Islands). While isolated thunderstorms can fire at any given time this afternoon, expecting the main threat to move through from west to east generally between 4 and 10 PM. While bulk shear values are better than we saw on Tuesday (30-40 kts), a limiting factor will be the amount of moisture and instability available, as well as marginal surface convergence given winds veering to the W/NW ahead of the mid level front. Even so, parameters are favorable for at least a few isolated severe storms, the main threats being damaging winds and large hail. Storms exit and die down following sunset and loss of diurnal heating. Post-FROPA, a cooler and drier airmass settles in. Dewpoints drop into the 50s, allowing for overnight lows to drop into the upper 50s and low 60s. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/... Key Messages... * Dry & sunny for Independence Day. Once the colder airmass moves into place overnight, we'll start to see some drying and more pleasant weather. Friday should be quite sunny, with temperatures in the low to mid 80s under a high pressure. && .LONG TERM /SATURDAY THROUGH THURSDAY/... Key Messages... * Dry and sunny through the weekend. * Heat and humidity increase Sunday into early next week. * Unsettled weather returns around late Mon/Tue but low confidence in timing/location details. The mid level trough finally exits east on Saturday with ridging building in followed by a weak shortwave early next week. This will pump up the heat and humidity, really starting on Sunday when the 90s return and continuing until at least Monday. Beyond that there is some uncertainty owing to the timing of a frontal system which may bring down temperatures while also introducing a chance for showers and thunderstorms as early at late Monday. For now, best chance of unsettled weather looks centered on Tuesday, which would bring down temperatures. && .AVIATION /19Z THURSDAY THROUGH TUESDAY/... Forecaster Confidence Levels... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. 18z TAF Update... Today and tonight...High confidence except moderate confidence on thunderstorm potential... areal coverage as well as timing. VFR outside of any scattered t-storm threats after 18z into the first half of the evening. Areal coverage and timing remains uncertain with this activity...but a few strong t-storms are possible which may contain locally strong wind gusts and hail too. The greatest risk is across interior MA and CT terminals. W winds generally 5-10 knots becoming more NW later tonight. Independence Day...High confidence. VFR. NW winds 5-10 kts at most terminals. KBOS Terminal...High confidence in TAF. Main concern is the risk for a t-storm in the vicinity of the terminal after 19z/20z into the early evening hours. KBDL Terminal...High confidence in TAF. Main concern is the risk for a t-storm in the vicinity of the terminal after 18z/19z into the early evening hours. Outlook /Saturday through Tuesday/... Saturday: VFR. Saturday Night through Sunday Night: VFR. Breezy. Monday: VFR. Breezy. Slight chance SHRA, slight chance TSRA. Monday Night: Mainly VFR, with local IFR possible. Breezy. Chance SHRA, slight chance TSRA. Tuesday: Breezy. Chance SHRA, chance TSRA. && .MARINE... Forecaster Confidence Levels... Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Today through Independence Day...High confidence. Winds/seas stay below small craft advisory thresholds through Friday. Winds will generally be in SW direction on the order of 7-15 knots before switching too a more NW direction tonight behind the cold front. Outlook /Saturday through Tuesday/... Saturday through Saturday Night: Winds less than 25 kt. Sunday through Sunday Night: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Areas of seas approaching 5 ft. Monday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of seas approaching 5 ft. Monday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers. Tuesday: Winds less than 25 kt. Chance of rain showers, slight chance of thunderstorms. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...None. RI...None. MARINE...None. && SYNOPSIS...McMinn NEAR TERM...McMinn SHORT TERM...McMinn LONG TERM...BW AVIATION...McMinn/FT MARINE...McMinn
The Brookhaven radar (KOKX), 126 km away, was scanning. The volume nearest the first event began at 21:32 UTC.
5 thunderstorm wind, 3 hail. Local standard time, as filed.
In Windsor Locks, a tree was down on Center St near Indian Mountain Rd.
In Enfield, trees and wires were down on King St.
In Enfield, trees were down on Wynwood Dr and Standish St.
In Newington, a number of large branches were down.
In Killingly, trees were down in town.
In Danielson, quarter sized hail fell.
In Killingly, quarter sized hail fell.
In Sterling, golf ball sized hail was reported which destroyed a gazebo.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Connecticut in 2025Every state in 2025This day in weather historyWarnings in Connecticut, July 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1260391, 1260392, 1260393, 1260394, 1260395, 1260388, 1260389, 1260390.