As mentioned in our Weekend Edition video this morning, 1DegreeOutside is closely monitoring a growing severe thunderstorm threat developing this afternoon across interior Southern New England and parts of the Northeast.
A Severe Thunderstorm Watch is now in effect until 8:00 PM EDT for parts of the Northeast, including southern New York, northern Connecticut, Massachusetts, southern Vermont, southern New Hampshire, and far southern Maine. Thunderstorms are expected to develop and intensify this afternoon in a southwest-to-northeast corridor across the region.
These storms may produce:
Damaging wind gusts up to 70 mph
Hail up to 1.5 inches in diameter
An isolated tornado or two
The environment is primed for fast-developing storms that may impact travel, power lines, and outdoor activities.
Ensure you have our 1DegreeOutside app downloaded, with LOCATION and NOTIFICATIONS turned ON so you’ll receive warnings.
Stay indoors and away from windows if a warning is issued.
Monitor radar and trusted local weather sources for updates.
Be ready to take shelter quickly if a storm approaches or a warning is issued.
1DegreeOutside is closely monitoring this evolving situation and will provide updates as needed.
The window for strongest storms is through the afternoon and into the early evening hours – primarily between 2 PM and 9 PM.
The greatest risk stretches in a confined corridor from eastern Pennsylvania and northern New Jersey through the Hudson Valley and interior southern New England, including:
Western to Central Massachusetts (Springfield, Pittsfield, Leominster)
Northern Connecticut (Hartford, Torrington)
Southern Vermont and New Hampshire (Keene, Lebanon, Concord)
Eastern New York (Albany, Poughkeepsie)
Boston, Providence, and coastal areas are less likely to see severe storms, but we’ll be watching radar closely for eastward progression, as some thunderstorms will likely survive the trip this evening.
Damaging wind gusts of 55–70 mph
Large hail up to 1.75 inches
Isolated brief tornado potential
While storms will likely be scattered to isolated in nature, any cells that do form will tap into moderate wind shear and instability, allowing for rotation in some updrafts and potential for pockets of severe weather.
Confidence is moderate to high that a Severe Thunderstorm Watch will be issued soon, as boundary layer heating and differential temperature gradients are creating a ripe environment for development, especially along and south of a frontal boundary stretched across the region.
The main uncertainty? How widespread the activity becomes, due to weak mid-level lapse rates—but even isolated storms could pack a punch.
Ensure you have our 1DegreeOutside app downloaded, with LOCATION and NOTIFICATIONS turned ON so you’ll receive warnings.
Secure outdoor items that could blow around in high wind.
If you’re in the areas listed above, check the radar before heading out for afternoon plans.
Stay weather-aware, especially if you live west of I-495 or near the I-91 corridor.
🔗 Stay Updated
Check the 1DegreeOutside app for live radar, custom alerts, and updates from Matt and Danielle. We’ll be issuing updates throughout the day as storms develop.
