Environment Canada's tornado warning for eastern Ontario has ended. From about 3:20 until 4 p.m. the agency said a severe thunderstorm could possibly produce a tornado in communities such as Kemptville and Merrickville. It's not yet known if a tornado formed.

After a stormy Wednesday evening in southern Ontario, including a tornado-warned cell and multiple areas seeing more than 50 mm of rain, the risk for severe weather will bubble up again on Thursday. However,

Summer in Ontario may bring with it warm weather, but last week's tornado in Lucan is a reminder that it’s also tornado season.

Stay alert for a potent line of strong to severe thunderstorms on Friday expected to sweep across southern Ontario

Severe weather shifts into eastern Ontario and southern Quebec, with heightened instability Thursday. Stay alert to heavy downpours, strong winds and large hail

Trees were topped and some buildings in Ontario County were damaged in what meteorologists said may have been a tornado on Monday evening.

There is a severe thunderstorm warning for communities from Arden to Carleton Place. Hazards include heavy rain, lightning and the risk of a tornado.

Strong thunderstorms moving through southern Ontario produced a tornado north of London on Monday afternoon. A humid and unstable airmass draped across the region fuelled a favourable setup for strong to severe thunderstorms. One of the storms acquired rotation near the community of Lucan, resulting in a short-lived tornado.

The National Weather Service in Buffalo has confirmed that a tornado touched down in Phelps on the evening of Monday, July 7. Rated an EF-2, the tornado had peak winds of 115 mph, a path length of 1.7 miles, and a maximum width of 300 yards. The twister was on the ground for 10 minutes, between 6:27 and 6:37 p.m.