After a very hot start to the week, beneath very smoky skies, Tuesday's cold front, which sparked damaging storms, will have swept out the humidity and cleared the air somewhat by Wednesday. More seasonal temperatures are ahead for the rest of the week, sometimes even below-seasonal, with hit-and-miss conditions in terms of showers and storms through the weekend. A closer look, below.
WEDNESDAY: COOLER, WITH CLEARER SKIES
Ontario has been no stranger this summer to the kind of extreme humidity and searing heat that's marked the beginning of the week, but Monday and Tuesday took on a somewhat surreal edge: wildfire smoke darkened the skies and turned the sun into a dim disk for most people.
However, though Tuesday's storms were potent and left behind several downed trees and damaged structures, the cold front that triggered them is ushering in some northerly flow that will help clear much of that smoke from Ontario's skies Wednesday.
Another welcome effect of that cold front: Not only has it swept out most of the humidity that's plagued the province this week, it's also taken the temperature down by a few degrees to something more along seasonal lines.
Wednesday's daytime highs will be in the low-to-mid-20s across the board, feeling only two or three degrees hotter with the lingering humidity.
BEYOND: COOL INTO THE WEEKEND, FOLLOWED BY UNSETTLED CONDITIONS
Those more bearable temperatures continue into the latter half of the week, and may even dip below seasonal in some areas.
Weatherwise, there's a threat for passing showers and thunderstorms for southern Ontario late Thursday, lasting into Friday, though Friday itself features fairer skies heading into the weekend, which itself looks somewhat unsettled.
"A system tracking into the Great Lakes region will bring rain and thunderstorms to southern Ontario late Saturday and Saturday night," Dr. Doug Gillham, a meteorologist at The Weather Network, says. "Risk for showers and thunderstorms into eastern Ontario and southern Quebec on Sunday, but mostly rain-free with near seasonal temperatures."
Beyond, there will be a couple of days of "very warm" weather early next week, but no prolonged heat episodes in sight otherwise through early August.
Thumbnail courtesy of Ms. Maki.
EDITOR'S NOTE: This article incorrectly stated that Toronto recorded the worst air quality in 17 years. It has since been corrected to seven years. TWN regrets the error.