|A Transport Quebec camera captures the slow traffic in thunderstorms in Montreal this morning. It has been a bad traffic week.|
A strong cold front, the beginning of the end of the heatwave, will begin to produce big thunderstorms this afternoon across eastern Ontario. These will settle into southern Quebec by 5 or 6pm and linger most of the evening. Heavy rain and strong winds are likely. A severe thunderstorm watch is in effect all day until midnight, but most of the strong storms will occur after 4pm for Montreal.