Tuesday, October 1st 2019, 6:40 pm - Power outages were reported as thunderstorms fired up across southern Ontario
October started with a roar across southern Ontario as record-breaking heat and humidity fueled July-like thunderstorms across the region. While the worst of the weather has passed, rounds of rain still loom into Wednesday. The same can't be said for the heat however -- a widespread frost threat will close out the week across the province. We look at where storms are still to come, and when temperatures fall, below.
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- Evening travel could be impacted in lingering thunderstorms
- Power outages reported in southern Ontario. Check here for updates
- Additional pulse of rain moves through southwest, GTA through Wednesday morning, lingering showers southwest through afternoon
- Strong cold front drives temperatures down second half of week
- Widespread frost threat through Friday
- Stay aware of ALERTS in your area
Heat and humidity surged their way into the record books in southern Ontario on Tuesday. Temperatures edged toward -- and even above -- the 30-degree mark for some, setting new unofficial records for places like Toronto. In fact, Toronto's high temperature was not only the highest on record for October 1, but for the entire month. The record for the highest humidex value is likely to fall as well.
LINGERING RAIN, THUNDERSTORMS INTO WEDNESDAY
That heat and humidity were vital ingredients in the thunderstorms that started to blossom across the region early Tuesday afternoon, ahead of a cold front set to slice through into Wednesday.
The strongest line of storms cut through the western GTA during the late afternoon, prompting severe thunderstorm warnings and leading to reports of damage and power outages. Though that line had crossed south of the border by the evening, it doesn't mark the end of the rain. Another push of moisture from the southwest will keep things soggy through early Wednesday.
WATCH BELOW: TRACKING RAIN INTO WEDNESDAY
AUTUMNAL END TO THE WEEK, WIDESPREAD RISK OF FROST
Despite lingering clouds and showers, Wednesday's cold front will sweep the early-week warmth out of the region, making Tuesday the last hot day of this year.
While showers will begin to clear out into Wednesday afternoon, skies won't really start to clear until the end of the work-week. Another weak system looks to bring showers across the Great Lakes for Thursday, with wet snow even possible across northern parts of cottage country and into the Laurentians and higher elevations of the Eastern Townships.
"Many areas will likely see the end to the growing season through Thursday and Friday night as we will have a widespread frost outside of urban/suburban areas," Gillham warns.
High pressure will clear out the clouds for Friday and the weekend, but sunny skies won't do much to help high temperatures. By Saturday, daytime highs will struggle to even hit the mid-teens with below seasonal conditions persisting into the start of next week.
Thumbnail courtesy Tom Broen/@tombroen