Environment Canada has issued a severe thunderstorm watch for areas of Southern Ontario, including Caledon, Newmarket, Georgina, Northern York Region, Uxbridge, Beaverton, Northern Durham Region, Waterloo, Wellington, Dufferin – Innisfil.
    
There is the potential for isolated severe thunderstorms late Friday afternoon and evening with large hail and strong wind gusts as the main threat.
    
Environment Canada has issued a special weather statement for the Greater Toronto Area, calling for lots of rain, starting Friday and into Saturday.