Federal meteorologists have issued a severe thunderstorm watch for Toronto and most of southern Ontario, advising there could be wind gusts of up to 90 km/h.According to a watch statement issued by Environment and Climate Change Canada on Saturday, heavy rainfall and quarter-sized hail could hit areas Saturday afternoon as part of an incoming weather system.“Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain,” the statement said.“Local utility outages are possible.”The Greater Toronto Area, Hamilton, Kitchener-Waterloo, Barrie and Peterborough are among the areas covered under the severe thunderstorm watch.Meteorologists issued a severe thunderstorm warning for certain communities such as Orillia as well as areas north of Belleville.