Southern Ontario is all set for what meteorologists and Environment Canada warn could be one of the most volatile outbreaks of weather in this year. A potent cold front sweeping in Michigan straight into a moisture-laden and warm airmass, unleashing a multi-day surge of violent thunderstorms in Ontario.
With the daytime high hovering near humidex values near 40-degrees Celsius across Windsor, London and Greater Toronto Area, the massive volume of atmospheric energy has already reached dangerous levels.
Looming threats from the severe storms in Southern Ontario
- Flash floods and torrential downpours – The slow-moving cells are expected to release nearly 30mm to 60mm of rain in the short bursts, which can easily overwhelm the drainage networks of municipality along the busy 401 Highway corridor.
- Destructive gusts of wind – Quick-moving bowing segments and clusters may pack localized straight-line winds between 90 and 130 kilometers every hour, snapping mature trees and threatening power grids.
- Hails in the size of golf balls – Serious updrafts are carrying the massive hails which measure more than 4 cm in diameter, presenting straight hazard to windows, vehicles and agricultural crops.
- Risk of Tornado – The explosive atmospheric shear of wind has put the forecasters in high alert, with conditions that are ripe for isolated supercells that are capable of creating destructive and sudden tornadoes.
The forecasters emphasize that while the prefrontal showers in the morning have already shaken some parts of the region, the most dangerous leg of the storm may take as a sharp and cold front pushes from the cottage country through Barrie, sweeping Niagara and GTA.
As atmospheric instability rises, the local emergency management officials are requesting residents remain vigilant.
Any sudden tornado warning in neighboring municipalities or Toronto will demand quick action, like moving to low-lying rooms or interior basements, away from glass. Given intense environmental setup driving such severe storms in Southern Ontario, the region faces a quick-impact 24-hour window before a more stable, cooler airmass, finally stabilizing the province on Thursday.
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