Environment Canada has issued a tornado warning for parts of Durham, York and Kawartha Lakes.

A tornado watch — issued earlier in the day — notes that damaging wind gusts of between 90 to 110 km/h are possible, with heavy downpours and nickel-sized hail.

“A cold front will sweep across southern Ontario late this afternoon. Ahead of and along the front, scattered thunderstorms are expected to develop. Some of these storms could become severe, with damaging winds, heavy rain and hail the main threats. A few isolated tornadoes are also possible,” the watch reads.

“Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles. Remember, severe thunderstorms can produce tornadoes. Heavy downpours can cause flash floods and water pooling on roads. Be prepared for severe weather. Take cover immediately, if threatening weather approaches.”