Thursday, August 26th 2021, 10:58 pm - Friday’s cooldown will feel much sweeter after the storms that swept over southern Ontario on Thursday afternoon.
We’re looking forward to a break after a stormy Thursday that brought torrential downpours and gusty winds to parts of southern Ontario. Slightly cooler and less humid air is on the way for southern Ontario on Friday before the heat builds again this weekend. More on what to expect this weekend and beyond, below.
FRIDAY: A BRIEF REPRIEVE FROM THE HEAT
A strong lake breeze boundary pushed across southern Ontario on Thursday afternoon, sparking multiple severe thunderstorms across the region.
Friday's thunderstorm risk will be confined to far southwestern Ontario, with a risk for severe storms around Windsor and Sarnia. The most potent storms could produce strong wind gusts and heavy rainfall.
After several consecutive days of high heat, fresher air behind a cold front will knock temperatures and humidity levels down to a manageable level to end the week.
Highs in Toronto will peak around 26°C on Friday, with a humidex in the lower 30s. It'll remain hot and humid in southwestern Ontario, though, where Windsor and London will see highs in the mid-30s and humidex values pushing 40.
LOOK AHEAD: SHARP TEMPERATURE DIVIDE INTO THE WEEKEND, LINGERING CHANCE FOR STORMS
There will be a sharp temperature contrast across southern Ontario Friday and Saturday, as a cold front sinks south into the region and then lifts back north as a warm front during the weekend.
"We'll see a break from the heat and humidity behind the front, with temperatures much cooler for cottage country, eastern Ontario and southern Quebec, but still hot and humid across southwestern Ontario," says Dr. Doug Gillham, a meteorologist at The Weather Network. "Hot and humid weather will surge back north during the weekend."
According to Gillham, this boundary will also be the focus for a few rounds of showers and thunderstorms through the weekend, including the potential for more organized storms.
A front trailing south from the early fall-like storm tracking to the north of the region will bring a threat for widespread showers and thunderstorms, which will track from west to east Sunday night and Monday.
It will remain hot across southern Ontario on Monday, with abundant sunshine and warm conditions persisting into the middle of the week.
Stay with The Weather Network for the latest forecast across Ontario.