There will be a Low risk of severe weather tonight as a line of thunderstorms moves into the region from Michigan.
This is a complicated forecast as it remains uncertain if the line of severe thunderstorms maintains it’s strength as it moves into the region. There is a chance that the line weakens, however, that may present a chance for isolated thunderstorms that remain severe. Alternatively, all thunderstorms may weaken and the severe weather threat may diminish.
The areas at greatest risk include Extreme Southwestern Ontario, including Chatham, Leamington, Sarnia and Windsor. The expected hazards include rainfall of 20 to 40 millimetres, the risk for an isolated tornado, wind gusts up to 100 km/h, and hail 2 to 3 centimetres in diameter. The risk for flooding remains low, however the risk for power outages is moderate due to strong wind gusts being the main hazard.
Regardless if the line of thunderstorms weakens as it moves into the area, the hazards are expected to be less intense further east. Areas in the Very Low risk area will likely see heavy rainfall, a low risk for a weak tornado, and wind gusts up to 90 km/h. Non-Severe thunderstorms are likely over the Niagara region, as well as portions of Midwestern and Central Ontario.
Ensure you have multiple ways of receiving weather alerts during the late night hours, and keep your phone’s ringer turned on.
Environment Canada has issued a Severe Thunderstorm Watch (Yellow Level) for Southwestern Ontario. They state that wind gusts of 90 to 100 km/h are expected, and there is a risk of tornadoes.
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