Classic fall storm setup in southern Ontario with rain, breezy conditions
A fall storm could throw a wrench in your weekend plans across Ontario amid a risk for heavy rains, gusty winds, and possibly even a couple of thunderstorms
This is the first classic fall storm we’ve seen in the Great Lakes this season, a testament to how dry conditions have been recently.
Residents can expect to see some rain, blustery wind gusts and maybe even some thunderstorms in parts of southern Ontario this weekend with the incoming storm--potentially disrupting any outdoor plans amid the warmer temperatures.
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Make sure loose outdoor objects and Halloween decorations are tightly secured or brought indoors before the blustery winds arrive on Saturday and Sunday.
Potent low builds over the Great Lakes
We’ll see a low-pressure system move into the Great Lakes this weekend.
A rich stream of moisture from south of the border will fuel heavy rainfall and a thunderstorm risk throughout the province.
Moisture and instability associated with our growing storm could give rise to thunderstorms over southern Ontario on Sunday. Cluster of storms is forecast to be in the vicinity of Lake Erie through the pre-dawn hours on Sunday morning, along the leading edge of the warm front.
The storm risk spreads north through early Sunday morning, up to cottage country and north of the Greater Toronto Area (GTA).
Sunday will feature instability across a big chunk of northeastern and southern Ontario as the low lifts north, giving Toronto the greatest risk of storms on Sunday afternoon.
Wind gusts to 80 km/h associated with thunderstorms is possible. Localized power outages, driving hazards, and pounding waves along shoreline are primary threats.
Rainfall will be much more organized across northeastern Ontario, with highest potential to exceed 50 mm, while some portions of southern Ontario are likely to get less than 20 mm. Locally higher amounts are possible beneath thunderstorms.
Gusty winds with low-pressure system
Winds will peak late Sunday morning into the early afternoon, with the chance of 50-80 km/h gusts at times, especially in thunderstorms.
Residents should ensure loose objects and Halloween decorations are brought inside or tightly secured before they go tumbling away in the blustery conditions.