It’s a high-stakes holiday weekend forecast across southern Ontario as a dynamic storm setup spreads over the region.
Gusty winds, heavy showers, and possibly even a few rumbles of thunder will precede a sharp temperature drop arriving just in time for our Thanksgiving on Monday.
The conditions you can expect very much depend on where you are in the province this weekend. It’s worth noting that there’s a high level of uncertainty surrounding precipitation coverage on both Sunday and Monday, stemming from uncertainty around a developing low-pressure system.
Bake some extra travel time into your plans if you’re heading out over the next few days.
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Sunday: Raw, dreary day on tap
Stateside thunderstorms expected to develop on Saturday night will move through the southern Great Lakes during the overnight hours. We could hear a few rumbles of thunder in portions of southern Ontario through the pre-dawn hours on Sunday.
Conditions won’t improve much throughout the day. A raw northeasterly wind will develop throughout the Golden Horseshoe as a centre of low pressure tracks near Lake Erie.
Folks around Niagara and Lake Erie can expect the heaviest precipitation, but forecasters expect some showers to push into the Greater Toronto Area (GTA) as well.
Precipitation should fall in the form of rain, but heavier precipitation at higher elevations could force a touch of snow to briefly mix in with the rain.
Monday: Chilliest day since April
Foul weather continues for some communities Monday as a secondary low-pressure system develops and gusty winds start blowing out of the north. We’ll start the day with a band of heavy showers expected to drape across the Niagara region and portions of the GTA.
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The precipitation risk will diminish through Monday afternoon as that low pushes east. However, we won’t fall out of its influence just yet as those northerly winds continue dragging chilly air into the region.
Temperatures will struggle to reach the double-digits throughout southern Ontario, with even chillier readings expected beneath more organized precipitation across eastern portions of the province. If Toronto fails to hit 10°C on Monday, it’ll be our first day mired in the single digits since April 25. Ottawa is looking at its coldest day since April 5.
Winds will help produce lake-effect showers off Georgian Bay and Lake Huron, providing the opportunity for scattered showers to persist into Tuesday.
Stay with The Weather Network for all the latest on conditions across Ontario.