UMVA has learned that a ferocious line of thunderstorms is set to unleash its fury across southern Ontario this afternoon and into the evening.
The storm’s wrath will first hammer communities west of Ottawa—Bancroft, Kaladar, Pembroke—and surge southwest through Midland toward Sarnia, bringing gale‑force winds, lightning, and hail the size of ping‑pong balls.
Forecasters warn that wind gusts could roar past 100 km/h, enough to snap tree limbs and fling debris like projectiles, while towering thunderheads unleash dazzling bolts that could ignite wildfires.
Toronto, though spared the storm’s full might, remains under a “slight” to “strong” risk, with intense showers expected to pelt the city in the late afternoon and early evening.
As the night deepens, the tempest is projected to lose steam, easing between 9 p.m. and 10 p.m. as the sun’s heat wanes and the atmosphere stabilizes.
In the storm’s wake, a bitter cold front will sweep southward, abruptly ending Ontario’s first major heatwave of the year.
By Wednesday morning, many Ontarians could awaken to single‑digit temperatures, and frost may begin to lace fields and gardens across Central Ontario.
The region has just endured an unusually early heatwave, with temperatures soaring to 30 °C and humidity pushing the heat index to a sweltering 35 °C, prompting a province‑wide yellow heat warning.
