Remarkable fall heat, storm risk preludes major cooldown in Ontario
A severe thunderstorm risk will accompany a summer-like boost in temperatures for southern Ontario on Tuesday.
The remarkable heat and humidity will likely be a parting gift from the summer season in southern Ontario this week.
Thanksgiving across southern Ontario was notable for its mild temperatures. Toronto reached a high of 22 degrees Celsius, while Windsor reached 26 degrees with a humidex of 31!
But don't get used to the warmth; the summer-like conditions and a risk of thunderstorms, perhaps for the final time this year, are expected to continue Tuesday before a sharp cooldown settles in.
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Be sure to stay alert to the changing conditions, and check for any weather warnings in your area.
Temperatures to soar early this week, with thunderstorm risk
Monday was nice, but it will feel even warmer on Tuesday as moisture from the remnants of post-tropical storm Rachel will sweep across southern Ontario, bringing about three times the atmospheric moisture than we'd typically see this time of year. With the intense humidex, temperatures will feel more like the low to mid 30s across much of the region, including the Greater Toronto Area and London corridor.
The day already started with a round of heavy rain and thunder for many across the province. With the heat forecast to peak ahead of a cold front tracking through in the afternoon, we'll see another chance for scattered showers and thunderstorms to develop.
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The heaviest rains should stay north of the Greater Toronto Area (GTA), in cottage country and eastern Ontario. With the tropical remnants and thunderstorms, we could even see up to 50 mm of rainfall across the Ottawa region.
The winds will shift to come out of the north by Wednesday night, and by the end of the week, as we approach next weekend, temperatures will be drastically cooler. Some areas will only hit the single digits for highs.
However, temperatures are expected to be changeable through the following week. Above-seasonal temperatures are then expected to return for late October and November thanks to El Niño.
Stay tuned to The Weather Network for the latest forecast updates for Ontario.