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Toronto Weather: Heavy Rainfall in GTA as Remnants of Hurricane Beryl

Toronto Weather: Heavy Rainfall in GTA as Remnants of Hurricane Beryl
Toronto Weather: Heavy Rainfall in GTA as Remnants of Hurricane Beryl

A rainfall warning has been issued for the city of Toronto. The remnants of Hurricane Beryl are expected to bring downpours tonight and tomorrow.

Environment Canada issued the warning Tuesday afternoon. It replaces a special weather warning that was previously in effect.

According to the weather bureau, most of southern Ontario could see 40 to 60 millimetres of rain as a result of the storm, with some areas seeing even more.

“While confidence in the exact course of the weather system remains somewhat uncertain, such systems have historically delivered very high rainfall totals in downpours,” the warning said. “Rainfall amounts are likely to vary widely across the region, with some areas receiving more than 60mm.”

Beryl made landfall in Texas on Monday as a Category 1 hurricane after leaving a trail of destruction across the Caribbean over the weekend.

The storm has weakened significantly since making landfall, but is still capable of bringing torrential rain to much of Ontario.

Rainfall is expected to begin around 1:00 a.m. The heaviest showers are expected during the morning rush hour on Wednesday.

“It looks like the heaviest rainfall will be in the Lake Huron area and eastern Ontario, but we could get 20 to 40 mm of rain (in the GTA) in a very short period of time and that will cause some localized ponding and flooding,” CP24 meteorologist Bill Coulter warned earlier Tuesday morning. “So be aware of that early tomorrow morning and maybe give yourself a little extra time. By the time Thursday is over, the whole system and the cloud will dissipate, making for a very nice weekend. The challenge will be dealing with it, especially tomorrow morning.”

The Toronto and Region Conservation Authority has issued a flood warning ahead of the system’s arrival, warning that “all riverbanks, rivers and streams within the GTA should be considered hazardous.”

The authority has said that due to the rainfall there is also “potential for widespread flooding” within its jurisdiction on both Wednesday and Thursday.

“Ground conditions are not saturated but are likely to become saturated across the TRCA jurisdiction following rainfall tomorrow (Wednesday) morning. As such, all watercourses and water levels within TRCA catchments are expected to rise from early (Wednesday) morning into Thursday due to the forecast rainfall,” the flood warning said.

Environment Canada warned that the heaviest rainfall could be 20 to 40 millimetres per hour.

However, the storm will not bring major gusts of wind.

The weather bureau says winds will only reach 20 km/h tonight and 30 km/h on Wednesday.

“As it enters the jet stream, it loses some of its tropical characteristics, its circular shape, and it becomes more and more elongated as it moves up the Ohio River Valley and directly into the Lower Great Lakes region,” Coulter said. “It’s going to arrive around 1 a.m. and because it’s elongated, there’s going to be a fairly long period of heavy rainfall. Most of that is going to come after midnight tonight, through the morning rush hour and into the middle of the day.”