Ontario: Incoming gusty storm aligns with start of fall
Tuesday, September 18, 2018, 10:06 AM - It's the last week of summer and although it doesn't feel like the season is ending with this lingering heat and humidity, an incoming storm aligns perfectly with the start of fall this weekend. Expect rain and falling temperatures with this system as well as the potential for localized power outages in areas that see strong wind gusts. More on the storm timing, PLUS a look at the quickly falling temperatures, below.
- High heat and humidity hangs on through the start of the week with humidex values in the mid to upper 30s
- Fall storm tracks into northern Great Lakes by Thursday
- Localized power outages possible, mostly in northeastern Ontario
- Cooler, more autumnal weather moves in for the weekend and into next week
SUMMER WEATHER IS ENDING
The last full weekend of summer sent southern Ontario right back into the heart of the season with abundant sunshine, hot temperatures and steamy humidex values persisting through the day on Monday.
"Similar conditions are expected for Tuesday," says Weather Network meteorologist Dr. Doug Gillham. "High temperatures will range from the lower 20s across northern areas to the mid 20s across the south."
By the afternoon hours, the humidity is set to steadily drop with a much cooler evening than what's been felt for the past several nights.
"Wednesday will bring brief relief from the muggy weather with sunshine and near seasonal temperatures," adds Gillham.
TYPICAL FALL STORM
The cooler weather however, will not last very long with the warm and humid conditions surging back into the region by Thursday as a fall storm tracks into the upper Great Lakes. A period of rain is expected Wednesday night and through Thursday morning with some sunshine returning to southern parts of the Golden Horseshoe by Thursday afternoon.
"Thursday night and Friday will be very windy, warm and humid as a fall storm tracks across the northern Great Lakes region," says Gillham. "Late in the day a cold front will cross our region with a period of showers and thunderstorms likely along with strong and gusty winds."
WATCH BELOW: STORM TIMING
Widespread power outages are not expected with this system, but some wind gusts up to 60-70 km/h could bring localized outages, especially in northeastern parts of the province.
"And it's really the direction of the wind that is going to dictate what weather you see and temperatures you see by Friday," adds Tyler Hamilton, another meteorologist at The Weather Network. "There's a stark contrast between southern Ontario with a southerly flow and parts of northwestern Ontario where daytime highs will hover in the mid teens."
FALL TEMPERATURES ARRIVE RIGHT ON CUE
Despite the dramatic difference in temperatures on Thursday and Friday, most of the province will be feeling autumnal in time for the official start to fall on the weekend. There will be plenty of sunshine to enjoy on Saturday, but daytime highs will be several degrees cooler than seasonal province wide.
"Next week looks to be a typical early fall week with active weather and changeable temperatures," says Gillham. "Another fall storm is expected to track into the northern Great Lakes early in the week followed by another shot of rather chilly weather during the middle of next week."
Near seasonal temperatures, and at times below seasonal, are expected to dominate through early October as well.