|Torrential rain and thunderstorms over midwest Ontario on Friday, June 23, produced widespread flash flooding.|
(CTV News London)
|Thunderstorms developed rapidly on Saturday, June 24 across eastern Ontario, including Cornwall, shown above. The storms, for the most part, missed the Island of Montreal. (ValleyWeather Photo)|
COOLER THAN NORMAL
An unseasonably cool air mass over the central Great Lakes will generate a series of weak disturbances this week. They will move across our region rather quickly, each producing clouds and instability. There will be an almost-daily chance of showers and scattered thunderstorms, with temperatures remaining cool for this time of year, either side of 21C (70F) through Thursday. As a result of the cool pool of air aloft, there is also the chance of small hail with any thunderstorms that develop. Overnight lows will be chilly under generally clear skies, around 12C (54F).
Briefly looking ahead to the Canada Day weekend, we can expect another round of warm and humid weather, with the risk of thunderstorms and possibly heavy rain. However, keep in mind, this is similar to what we were expecting this past weekend, and the weather turned out mostly dry in Montreal.