There were no immediate reports of serious injuries.
The National Weather Service had issued a tornado warning for Litchfield, Hartford and New Haven counties during the afternoon and there were unconfirmed reports of a tornado in Litchfield County.
Weather officials won't be able to confirm that a tornado struck until they conduct a survey Thursday.
Television reports showed a roof of a gas station collapsed on Route 6 in Bristol, and merchants in that town cleaning up glass from some blown out windows.
Middletown police said lightning hit a house just after 5 p.m. causing some damage.
