Monday on repeat: More storms brewing across eastern Ontario, Quebec Tuesday
No, it isn't still Monday, although the weather may make some folks feel like it still is
After a day of widespread active weather across parts of Ontario and Quebec on Monday, Tuesday may feel a bit like déjà vu for folks in eastern Ontario and southern Quebec as the slow-moving, low-pressure system driving this active weather makes its way east.
DON'T MISS: Forecast calls for flexible plans for your long Canada Day weekend
Tuesday
Areas: Eastern Ontario, including Ottawa; southern Quebec, including Montreal
Timing: Through the afternoon and early evening
Weather: The same humid air mass means torrential rain that may disrupt commutes will once again be on the table. Localized rainfall amounts over 50 mm is possible with these storms, and since they’ll be moving quite slowly, that this will increase the threat of some flooding.
SEE ALSO: Potent storms spin off tornado warnings, funnel clouds in Ontario, Quebec
The severe storm threat will be diminished across E. ON compared to Monday, but we’ll still watch for a storm that approaches severe limits–particularly closer to highway 401 east of Brockville. The greatest risk of severe thunderstorms is across southern Quebec, where the upper level winds will be more organized. A slight window for tornado potential is present in the late afternoon, particularly Trois-Rivières and surrounding regions, but dynamics are only just meeting thresholds. At this point in time, there is a non-zero chance of a tornado forming from some of these disorganized storms.
Confidence: High confidence for the development of widespread shower and thunderstorm activity, similar to Monday
WEDNESDAY
The Greater Toronto Area will see its final day of pop-up thunderstorm activity on Tuesday, with Wednesday looking quite fair and dry.
As the low continues to move east into Wednesday, with more thunderstorm potential in Quebec, drier conditions will move into southern Ontario. The sunshine chances will present themselves, but unfortunately, the smoke will once again return.
The winds wrapping around this low pressure system will allow the smoke to travel southwestwards impacting Sarnia, Windsor, and London by Tuesday evening, and then the GTA by Wednesday. Special Air Quality statements are already in effect, and likely to expand in the coming days.
Current indications are that Canada Day looks unsettled with the risk of thunderstorms and some natural fireworks possible as another trough moves in.
Keep checking back to The Weather Network for more forecast information and updates for Ontario and Quebec.