Monday, April 25, 2022, 9:02 a.m. – Spring is in full swing this week as mild temperatures and thunderstorms are replaced by snow and cold in southern Ontario.
During the spring, which seems to have almost no constant pleasant spring weather, this week will bring another reminder of how inconsistent this season usually is. After a gust of mild temperatures and sunny skies until the end of the weekend, clouds will accumulate throughout the day on Monday with warmer daily highs early. The cold front will bring rain to much of the region, with the risk of several built-in thunderstorms around Lake Ontario and the Niagara area. From there, high temperatures during the day will remain below seasonal this week, even moving around the freezing point for some areas in the middle of the week. More about the upcoming big temperature drop below.
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THIS WEEK: TEMPERATURES BEFORE A GREAT FALL TO SEASONAL CONDITIONS … AGAIN
For some areas, especially southwestern Ontario, Monday will be one of those unique days when high temperatures occur in the early hours of the morning. Toronto and Niagara were forecast to reach 20 ° C, probably the first 20-degree day of the year for some. A maximum of 20 ° C was also expected in eastern Ontario, from Ottawa to St. Lawrence.
However, the prolonged heat will end abruptly as a cold front passes through southern Ontario from the west, sending temperatures to drop during the day on Monday.
Scattered rain will accompany the front as it passes through the countryside, especially in the afternoon and evening. There is also a risk of several built-in thunderstorms around Lake Ontario and the Niagara area. Then we will see afternoon temperatures from low to medium teenagers for much of the region.
The ridge on the upper level, which brought us a warm weekend, will move downstream and allow the upper level to take its place. This fall will bring much cooler air, with temperatures struggling to reach double digits by Tuesday.
By Tuesday night, a rapid burst of Arctic air was moving to the lower reaches of the Great Lakes, with temperatures dropping around freezing. We could see the potential for snow in central and southern Ontario all Tuesday night, especially near Georgian Bay and Lake Huron.
Temperatures can be up to 10 ° C below seasonal until Wednesday. In fact, the upcoming series of sub-seasonal air will put parts of southern Ontario on par with the regions closer to the Arctic Circle. Mount Forecast, for example, can expect a high temperature of just 1 ° C on Wednesday.
This spell of off-season conditions seems to continue until early May, with no signs of constant heat in the near future.
Stay tuned to The Weather Network for the latest Ontario conditions.
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