The severe thunderstorm watches and warnings across Southwestern Ontario on Wednesday ended by 10 p.m.
Environment Canada issued a watch for Sarnia-Lambton, Windsor-Essex, Chatham-Kent, London-Middlesex, Elgin, Oxford, Huron, Perth, Grey and Bruce Counties just before 1 p.m.
Just before 4 p.m. Environment Canada upgraded the thunderstorm watch to a warning for Windsor and Essex County, Sarnia - Petrolia - Western Lambton County, and Chatham Kent. Shortly before 5 p.m., the rest of Lambton County was also upgraded to a severe thunderstorm warning.
Around 5:30 p.m., Windsor-Essex was downgraded back to a thunderstorm watch while London-Middlesex, Huron County, Bruce County, and Western Elgin County were upgraded to severe thunderstorm warnings.
The line of severe thunderstorms continues to move through southwestern Ontario.
At 6:20 p.m., Environment Canada ended the thunderstorm warning for Chatham-Kent and in Eastern Lambton County while new ones were issued in Oxford and Eastern Elgin County.
Around 7 p.m., the warning ended in Western Middlesex and Western Elgin counties though the thunderstorm watch continued. Less than an hour later, the warning also ended in Oxford, Eastern Middlesex, and Eastern Elgin counties.
The weather agency said conditions were favourable for dangerous thunderstorms that could produce strong winds, large hail and torrential rain.
Wind gusts could reach 100 km/hour and produce heavy downpours and nickel size hail.
The scattered storms are expected to last until Wednesday evening.
"Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles," Environment Canada said.
The weather agency is warning that heavy downpours can cause flash floods and water pooling on roads.
Environment Canada also said if there is severe weather to take cover immediately and water-related activities may be unsafe because of violent and sudden gusts of wind over bodies of water.