Storm risk increases ahead of summer's hottest days in parts of Ontario
Tuesday will see another opportunity for thunderstorms in southern Ontario before some of the warmest temperatures of the summer builds in by mid-week
The stormy pattern will see another chance for thunderstorms to fire up in parts of southern Ontario Tuesday and Wednesday, after some developed on Monday afternoon in the region. This will precede a boost in temperatures as the effects of a stateside heat dome will be felt by Wednesday afternoon.
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The strong heat dome situated over the central U.S. tilts across the Upper Midwest and Great Lakes basin by Wednesday and Thursday, with many regions looking at a few consecutive days above 30°C. In some places, these could be the hottest days of summer so far.
Tuesday
Areas: Ontario and Quebec
Timing: Afternoon and evening
Weather: Thunderstorms will once again bubble up across southwestern Ontario on Tuesday, but they will be quite hit-or-miss. Localized winds will converge and spark thunderstorms across the Niagara Peninsula and areas north of lakes Erie and Ontario. Torrential downpours will be the primary hazards with these particular thunderstorms, with the risk of small hail as well.
Warmest temperatures of the summer?
The strong heat dome situated over the central U.S. tilts across the Upper Midwest and Great Lakes basin by Wednesday and Thursday.
Wednesday will be the first scorching day of the week with widespread 30-degree temperatures forecast all across southern Ontario.
Windsor is looking at four consecutive days above 30°C. It’s likely that the maximum temperatures of this heat event will push close to 35°C for a couple of weather stations in extreme southern Ontario.
Most areas will not have their warmest temperature of the year so far, but places in the southwest could, including Windsor, which is forecast to reach 34°C on Friday.
What’s more concerning are the overnight temperatures that are forecast to stay elevated in the low 20s, even through the pre-dawn hours. Those without access to air conditioning will get little reprieve from the heat.
Keep an eye out for symptoms of heat exhaustion and heat stroke in those most susceptible.
Stay with The Weather Network for the latest on conditions across Ontario.