List of Connecticut tornadoes

Although historically the U.S. state of Connecticut is not typically known to fall casualty to tornadoes, more than 100 of these powerful storms have affected the state in modern history, resulting in at least 48 deaths, 780 injuries, and more than $500 million in damage.^[1][2] This list of tornadoes in the state is likely incomplete, as official records date back only to 1950 for tornadoes in the United States.^[1]

As with most of the northeastern United States, the number of tornadoes peaks in the summer months, normally in July or August. Hartford County has had the most tornadoes in the state, although since 1950 Litchfield County has reported the most tornadoes. Several areas have been struck more than once, and Waterbury has been struck by no less than four tornadoes since 1955.

From 1953 to 1991, Connecticut recorded an average of about 1.3 tornadoes per year, ranked 43rd in the United States.^[3] Although Connecticut tornadoes are typically weak, isolated events can be violent. Three tornadoes of F4 intensity have affected the state in its history, as well as at least 27 tornadoes of F2 intensity or greater. Outbreaks of three or more tornadoes in a single day occurred in 1786, 1787, 1878, 1973, 1989, 1998, 2001, 2018, 2020, and 2021. The year 1973 was particularly active; eight tornadoes occurred on six separate days. The year 2018 has the highest number of tornadoes recorded in the state in a year, with nine total. The 1878 Wallingford tornado killed at least 29 and likely 34 people in Wallingford, the most by any tornado event in Connecticut history.