UPDATE: Severe thunderstorm watch ends

A thunderstorm over Hillman Marsh, August 27, 2016. (Photo courtesy of Robert Longphee)

Thunderstorms that moved across southwestern Ontario on Sunday appear to have passed as Environment Canada has ended a severe thunderstorm watch.

The weather agency issued the watch on Sunday morning. The watch was upgraded to a warning shortly after for Chatham-Kent and then for Windsor-Essex. The warning was later downgraded back to a watch.

Meteorologists tracked a severe thunderstorm capable of producing very strong winds, up to nickel size hail and heavy rain.

According to Environment Canada, wind gusts of up to 90 km/h were possible.

Around 3:19 p.m. on Sunday, Environment Canada ended a heat warning for London-Middlesex, Chatham-Kent, Windsor-Essex, and Sarnia-Lambton. Just over three hours later, the severe thunderstorm watches ended for the areas.