Ashmont, MA Tornado History — 46 Tornadoes Since 1950
How many tornadoes has Ashmont, MA had?
Ashmont has had 46 tornadoes on record within 25 miles since 1950, including 3 violent (EF3+) tornadoes.
When was the most recent tornado near Ashmont?
The most recent tornado within 25 miles of Ashmont was an EF0 on September 6, 2025.
When is tornado season in Ashmont?
July is historically the peak month for tornadoes near Ashmont, with 13 on record. Spring through early summer (April–June) generally sees the highest activity across most of the central and southern United States.
At a Glance
Recent Tornado Activity Near Ashmont
The last 20 years of confirmed tornadoes within 25 miles — 12 total, averaging 0.6 per year over this window.
Tornadoes by Decade
Tornadoes by Enhanced Fujita Rating
F0–F5 ratings (pre-2007) are grouped with their EF equivalents. The Enhanced Fujita scale replaced the original Fujita scale in February 2007.
Tornadoes by Month
Casualties on Record Near Ashmont
96 fatalities have been recorded within 25 miles of Ashmont since 1950, across 3 events. 1,269 injuries have been reported across all events. 1953 was the deadliest year on record.
The deadliest single event was a F4 on June 9, 1953, which caused 94 fatalities along a 34.9-mile track.
Notable Tornadoes Near Ashmont
About Tornadoes in Ashmont
This overview was written July 24, 2026. The tornado counts and notable-event figures elsewhere on this page reflect the latest data and may differ from this summary.
Ashmont is a neighborhood on Boston's south side, part of the larger Dorchester district in the coastal lowlands of eastern Massachusetts. Southern New England lies well outside the country's busiest tornado regions, but it is not exempt: the area records tornadoes in most years, and its longer history includes a few rare, powerful ones.
Tornadoes near the Massachusetts coast are chiefly a summer occurrence. On humid days, strong surface heating can make the atmosphere unstable, and when an upper-level disturbance supplies wind shear, thunderstorms can build tall and occasionally rotate. The nearby ocean and its sea breeze often influence exactly where storms develop on a given afternoon. Because such events are infrequent here, they can be easy to underestimate, which is a good reason to take severe-weather watches and warnings seriously even in a dense coastal neighborhood.
The Enhanced Fujita (EF) scale rates tornado intensity from EF0 to EF5 based on a survey of the damage rather than a measured wind speed. Nearly all of the region's tornadoes are weak, with violent ones being rare. The tornado history for the Ashmont area — counts, the decade and rating breakdowns, and the deadliest, costliest, and most recent events — is drawn from the NOAA Storm Prediction Center and shown in the figures elsewhere on this page.