At 3:52 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing strong wind gusts, up to nickel size hail and heavy rain.This severe thunderstorm is located 6 kilometres east of Mount Joy, moving southeast at 20 km/h. Hazard: 70 km/h wind gusts and nickel size hail.Locations impacted include:Pickering, Ajax, Green River, Atha Road, Whitevale, Cherrywood, Clarkes Hollow, Dixie, Brougham, Brock Road, Deckers Hill, Greenwood and Kinsale.###Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.