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National Forecast: Storms, hail and humidity

From tornadoes to tennis ball-sized hail, this is your morning briefing

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Dalia Ibrahim
Digital Reporter

Friday, August 1, 2014, 8:21 AM -

Severe weather on Thursday reminded us of how powerful summer storms can be. From tornadoes to tennis ball-sized hail, this is your morning briefing for Friday, August 1. 

1. Tornadoes and damaging hail 

Severe thunderstorms roared through eastern Ontario and southern Quebec Thursday, bringing torrential downpours, large hail, and powerful gusts to the region.

RELATED: August arrives with wicked summer storm!

Around 2:30 p.m. EDT, a microburst in Pointe-du-Lac brought down about 20 mature trees, lifted several catarmans that were on the Saint Lawrence River, and damaged part of a viaduct, forcing the the closure of Highway 40. Hail stones of 2.5 cm in diameter were also reported in Louiseville.

Residents in Drummondville reported flooding in their basement, where 37 mm of rain fell in just 45 minutes. One centimetre in diameter hail also fell in the area.

As the day progressed, the storm grew stronger -- particularly in the Pont-Rouge area, where an EF1 tornado with winds of 150 km/h touched down around 4:30 p.m.. According to Environment Canada, a part of a roof was blown away, a shed was pushed and trees were uprooted. Large hailstones between 2.5 and 3 cm in diameter were also reported. 

This is Quebec's sixth tornado of the season.

TORNADOES IN CANADA: Everything you need to know

2. Storms on the Prairies 

Powerful storms passing through parts of the Prairies brought winds exceeding 100/h, heavy rain, and up to tennis ball-sized hail.

Among the hardest hit areas was Bragg Creek, Alta., where residents reported broken windshields, skylights and windows as a result of a hailstorm.

This risk for isolated severe thunderstorms continues Friday. Heavy rain, hail and strong wind being the major threat.

Be sure to monitor our ALERTS page for updated watches and warnings.

3. Widespread showers loom for southern Ontario 

Friday will bring a return to highs in the mid 20s and a humidex near 30 in southern Ontario, making it feel more like summer for the first day of August. 

Scattered showers and thunderstorms could bring a brief interruption to the day, but most of the day will be rain-free.

This weather pattern will continue into the weekend. 

The good news is that the region will see a lot of sunshine with seasonal temperatures on both Saturday and Sunday. However, there is a risk for a passing shower or thunderstorm during the afternoons and evenings. 

4. Humidity FINALLY begins to break in Newfoundland 

To say it's been sweltering across parts of Newfoundland would be an understatement. 

Multiple heat records were broken, including in St. John's where temperatures reached 29.4 °C -- the hottest it's ever been in the capital city since 2004.

Humidity continues today, but will slowly dissipate through the weekend. 

Meanwhile, the Maritime provinces are back up to seasonal, with humidity expected to peak over the weekend.


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