Thunderstorm watch dropped for Toronto, still in place for part of GTA

Environment Canada has dropped a thunderstorm watch for Toronto, but it remains in effect for other parts of the GTA.

“Thunderstorms have developed along a cold front that will sweep through the area today,” the national weather agency says.

It also says the storm system, which arrived Wednesday afternoon, could bring around 50 millimetres of rain to fall within an hour, with wind gusts up to 90 km/h.

Certain parts of Toronto saw isolated flooding on Wednesday.

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The anticipated rainfall is the first one since last week’s storms that brought severe flooding to the GTA.

Nearly 98 millimetres of rain fell in Toronto on July 16, making it the fifth wettest day in the city’s history.

The heavy rain caused flooding on the Don Valley Parkway and Gardiner Expressway, as well as subway stations including Union Station. Power was also knocked out for thousands of homes and businesses.

The average rainfall for July is 74 millimetres and Environment Canada meteorologist Geoff Coulson says 186 millimetres of rain has already fallen at Pearson International Airport.

The wettest July ever at Pearson International Airport was 193.2 millimetres set in July 2008.

The wettest month of all time is October of 1954 at 213.9 millimetres.

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With files from Laura Carney and Irene Preklet, 680 News Radio Toronto