After a refreshing weekend in southern Ontario, the heat will return with a punch this week, as summer officially begins. An unusually strong, extensive high-pressure ridge south of the border will be responsible for trapping some of the hottest temperatures and humidity values to date this year, and some have been recorded. Temperatures reaching the low and mid-30s and the same values in the 1940s will dominate the area as the week progresses, with no relief for the immediate future. There will also be rain and thunderstorms in parts of Ontario on Monday. For more on this week’s heat and humidity, read below.
THIS WEEK: EXTREME HOT AND MOISTURE RETURNS TO Ontario
Out with the cool, and in the heat and humidity this week – and I will be here for an extended stay – which coincides with the summer starting in the Northern Hemisphere on Tuesday. As the unusually strong high-pressure ridge continues to move further north into parts of Eastern Canada, including the Great Lakes, Ontario will begin to feel increasingly uncomfortable due to rising humidity. On Monday, extreme heat will reach northwestern Ontario and the extreme southwest, with daytime highs reaching the low 30s. This heat wave will continue through the middle of the week, reaching the greater Toronto area (GTA). Also during Monday, a warming front will carry the risk of rain and thunderstorms in areas of northeastern Ontario and cottages, and possibly a rainstorm for parts of Golden Horseshoe at night. While the possibility of storms remains in the forecast, the danger is very scattered in nature. Rising heat and humidity will be what he remembers this week. On Tuesday, humidex prices in all sectors will be in the high 30s and low 40s. Even the Omd Timmins will feel like 44 on Tuesday – equaling the all-time record set on July 1, 1963. For areas near the lakes, the direction of the wind will be decisive for how hot it gets. Sault Ste. The Marie is usually sheltered from the heat by three Great Lakes, but on Tuesday it will have an ideal wind direction from the Michigan Upper Peninsula, pumping the humidex at 41 before falling to 19 on Wednesday. Similar conditions are expected throughout the week, even next weekend with minimal relief. Stay tuned to The Weather Network for the latest Ontario forecast updates.
