Thunderstorm activity moved through the Sheffield area between Hamilton and Cambridge around 10:30 p.m. ET.
There are reports of heavy damage:- Residents reported siding and shingle damage to their homes, as well as significant damage to a recreational vehicle.
- A set of bleachers at the local ballpark was reportedly carried a short distance in the air.
- Photos on social media also shows evidence of some tree damage.
According to CBC meteorologist Jay Scotland, the damage track from the incident appears to be relatively narrow. However, some of the damage was scattered in different directions, which indicates a possible tornado.
Environment Canada will continue the investigation later Wednesday morning by sending a surveyor to Sheffield to look at the damage path.
A final determination may be made later in the day. If confirmed, this would be the 19th tornado of 2014 in Ontario.