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First chance at lake-effect flakes as Ontario's warm fall weather stretch ends

Thursday, October 21st 2021, 8:46 pm - Ontario's extended stretch of above seasonal autumn warmth finally comes to a close, with a colder pattern taking shape this weekend.

Daytime highs at or near the 20-degree mark are a thing of the past now a cold front has moved through southern Ontario, with temperatures set to take a significant tumble into the weekend. For some areas, daytime highs will struggle to even climb above 10°C by Saturday, with even the threat for lake-effect flurries over higher elevations. More on the unsettled conditions ahead, whether this stretch of cooler weather is now here to stay, below.

SNEAK PEEK: Brace for a change, Canada: Pattern flip-flop as we fall into winter

INTO FRIDAY: OVERNIGHT SHOWERS GIVE WAY TO COOLER TEMPERATURES

Thursday was decidedly gloomier than the days preceding, with slightly chillier temperatures and showers as a system moved through, with a slight chance of thunderstorms here and there.

The storm risk has subsided, but a few showers are still possible overnight for some areas, though not deluges by any means.

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The gusty, northwest winds will also usher in cooler, fall air in behind the low Thursday night and into Friday morning. Friday itself, will see temperatures closer to the seasonal mark – though it will cooler, in comparison to the balmy temperatures of the past weeks.

Friday's temperatures will hover close to the seasonal mark, but will feel much cooler compared to the balmy conditions of late.

Lake-effect showers will target areas south and east of Lake Huron and Georgian Bay as well.

MUST SEE: Waterspouts, lake-effect showers likely in Ontario as Great Lakes run a fever

WEEKEND: MUCH COLDER PATTERN TAKES SHAPE, FIRST THREAT FOR LAKE-EFFECT FLAKES

Some higher elevations of southern Ontario, south of Georgian Bay, may even see some mixing or wet snow in the early morning hours of Friday or Saturday.

The cooler and unsettled weather will persist into the early parts of next week, before a brief bounce back during the middle of the week. Overall, the month of October still looks to tip to the warm side of seasonal.

Be sure to check back for the latest updates on Ontario's fall weather.

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