Tornado, severe thunderstorm watches for southern Ontario

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Environment Canada has released Thunderstorm Watches and Warnings Also sees tornadoes for parts of southern Ontario.

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Meteorologist Natasha Ramsahai explains that a cold front has been triggering in the storm-initiating region north of the GTA, including cottage country, on Tuesday afternoon. The atmosphere prepared for a storm in the warm region, behind a warm front that increased temperatures and humidity during the day.

After the clouds cleared in the afternoon, the heat of the sun provided additional energy to drive the storms north. This additional energy helped accelerate the updraft and downdraft within the storms, resulting in very large hail.


The winds at the surface were coming from a different direction than the winds above. This “shear” was necessary to add “twist” to some of these storm cells, resulting in tornado watches and warnings.

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As the line of storms sinks south into GTA at night, there will be less heat during the day, but they’ll still pack a punch with rain and wind.

Gusts in excess of 70 to 90 kph for the South GTA region and up to 100 kph are possible for the Northern GTA region as they pass through Tuesday night, especially if the line of storms begins to form a “bow echo”. , which is the curved line on the radar.

There is still a chance of hail in GTA but it may be smaller than the day before heading north.

Watch meteorologist Natasha Ramshai’s update till 8:30 pm on Tuesday below:

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