Posted July 19, 2013 at 4:59:00 PM EDT

At 4:50 EDT, meteorologists are tracking an area of severe thunderstorms extending from southern Lake Huron through Lake Simcoe and the northern GTA, and east northeastward to the southern Ottawa Valley.



These are dangerous storms. A roof has been reported blown down in the Petawawa area and trees have been blown down. Wind damage has been reported in Petawawa, Pembroke, Gravenhurst, Bracebridge, Barrie, and Coldwater.



The individual thunderstorms are moving eastward at 80 km/h while the area of thunderstorms is sinking southward at about 30 km/hr.



The thunderstorms are capable of producing damaging winds and large hail as well as the threat for a tornado. Torrential downpours are also associated. Some places could see local rainfall amounts of 50 mm in an hour.