Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain.Hazards:Wind gusts up to 90 km/h.Up to toonie sized hail.Heavy rain leading to total rainfall amounts of up to 50 mm over a few locations.When:This afternoon and evening.Additional information:Scattered thunderstorms will develop this afternoon ahead of a cold front. Some of these thunderstorms may reach severe thresholds.###Local utility outages are possible. Damage to roofs, fences, branches or soft shelters is possible.Heavy rain can cause flash flooding and significant reductions to visibility.Severe thunderstorm watches are issued when conditions are favourable for the development of thunderstorms capable of producing damaging hail, wind or rain.Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.For more information: https://www.ontario.ca/page/be-prepared-emergency.