Summer-like weather fuels multi-day thunderstorm threat in Ontario, Quebec

·3 min read
Summer-like weather fuels multi-day thunderstorm threat in Ontario, Quebec
Summer-like weather fuels multi-day thunderstorm threat in Ontario, Quebec

This spring has certainly tested the patience of Canadians alike, with rounds of late wintry weather and a lack of consistently warm temperatures.

In fact, it's been 30 years since the city of Toronto recorded a 20°C this late in the season.

But the month of May is making up for it in a hurry, with soaring temperatures being felt across parts of northern and eastern Ontario and into southern Quebec as well. A May heatwave continues with 30°C temperatures stretching from Timmins to Windsor through to Ottawa and towards Saguenay for Friday.

Heatwave ON/QC
Heatwave ON/QC

According to MétéoMédia, there have been very few heat waves that have occurred in Quebec during the month of May.

"Since the start of data collection in 1942, Montreal has observed only four heat waves, with the last being in 2020," MétéoMédia stated. "Moreover, on May 27, 2020, Montreal was treated to a 36.6°C day and this was the hottest temperature recorded in May for the region."

MUST SEE: You may never guess which Canadian city hit 30 C first this year

image - 2022-05-12T062151.379
image - 2022-05-12T062151.379

This would also be the earliest heat wave on record for the city of Montreal, with the previous record dating back to May 17-19, 1962.

"So the next few days have the potential to mark the history books," says MétéoMédia.

While the rising temperatures may tempt you to find sources to cool off, officials warn against dipping into any larger bodies of water such as lakes and rivers, which remain dangerously cold. In May, the bodies of water are barely free of the ice, and thermal shock can occur when the water temperature is below 10°C.

The summer-like weather will continue until Saturday, with temperatures sitting in the mid to upper 20s, and into the lower 30s before a cold front brings an end to the early summer heat.

WIDESPREAD THUNDSTORMS THREAT FOR THE WEEKEND

With the rising heat comes a multi-day thunderstorm threat this weekend.

"Saturday will be primarily air mass driven thunderstorms. With no main trigger to initiate storms, the daytime heat will be the primary driver of storm initiation and they will be isolated and scattered in nature," says Kelly Sonnenburg, a meteorologist at The Weather Network. "Most should remain below severe warning criteria."

Storm Energy ON/QC
Storm Energy ON/QC

A passing cold front Sunday across southern Ontario and Quebec will be the trigger for storm initiation. Extra instability in the atmosphere may allow some storms to turn severe. This cold front will be the gateway for fresher, below seasonal air to make a return to the region.

QUICK SHIFT BACK INTO APRIL-LIKE TEMPERATURES, RISK OF FROST NEXT WEEK

Temperatures turn much colder next week with daytime highs in the single and low double digits more typical of April.

Cold temps Tuesday ON/QC May 13
Cold temps Tuesday ON/QC May 13

Some higher elevations in southern Ontario will even need to watch out for frost Wednesday morning as temperatures creep towards the freezing mark.

Temperatures should rebound back to seasonal and possibly above seasonal for the start of the May long weekend that follows.

Be sure to check back for the latest weather updates across southern Ontario and Quebec.

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