Toronto is set to break the city’s record for the most rain on March 5 but it doesn’t compare to a summer downpour.
On a summer day, 45 mm can soak the city during one thunderstorm, said Environment Canada severe weather forecaster Ronald Lee.
But to break the record for rainfall at Pearson International Airport on March 5 there need only be a tad more than 1959’s 16.1 mm.
“We’ll break that easily,” Lee said.
“You can find a record for something everyday.”
Environment Canada has reissued a rainfall warning for Friday and Saturday’s rain, saying that some areas of southern Ontario are expected to get as much as 50 mm.
Toronto is expected to 25 mm on Saturday, enough to break 1959’s record.
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As of noon, there had been 10 mm. A warning wouldn’t usually be issued for rain unless 50 mm was anticipated, Lee said. But during winter and early spring, added prompt warnings for less rain.
The busiest times for flooding and weather-related home damage are when the weather warms up around March and when summer storms hit around July, according to Shaun Delorey, a branch manager of FirstOnSite Restoration.
Snow that hangs around the outside of homes can cause basement flooding for some homes, said Delorey, who works out of the restoration company’s Kitchener office.
There have only been about 12 calls for help within the GTA so far, he said, but more are expected as the rain continues.
“That’s the good part,” Lee said. “The bad part is that it will turn into snow.”
The rain will change into snow and freezing rain at times overnight continuing into Sunday morning.
Still, this weekend’s weather is better than March 16, 1942, when 41.7 mm of rain set the record for the most rain in one day during the month of March.