Southern Ontario weekend weather brings rain, wind and cold

The first full weekend of summer is feeling more like the fall for many people, as a low-pressure system drives stormy weather into southern Ontario.

Weather on Sunday may be so cool, Pride parade watchers in Toronto may need sweaters

Environment Canada called for cold, rainy and unseasonably cold weather this weekend, with temperatures expected to stay below 20 C. (John Rieti/CBC)

Environment Canada has issued a special weather statement for much of southern Ontario, calling for heavy rains and unseasonably cool temperatures for the first full weekend of summer.

A low-pressure system is expected to arrive in the area from the U.S. Midwest on Saturday and "spread rain across southern Ontario from west to east through the day," Environment Canada said in its alert issued on Friday. An isolated thunderstorm is also possible on Saturday.

Heavy northeasterly winds gusting between 50 and 70 km/h are also forecast for Saturday. The temperature is expected to stay below 20 C all weekend.

It's going to be a cool and possibly rainy summer day for Sunday's Pride parade in Toronto. (CBC)
CBC Toronto meteorologist Jay Scotland says Friday night's forecast looks nice, "but it's all downhill after that."

Scotland said Saturday will start out cool but dry until around noon, when it will begin raining steadily.

Rain is expected to continue through Sunday afternoon in most areas "and may be heavy at times," Environment Canada warns.

Between 30 and 60 millimetres of rain could fall in the region from Windsor to the Golden Horseshoe, and between 20 and 40 millimetres of rain could fall over central and eastern Ontario.

On Sunday afternoon, when thousands will take to the streets of Toronto for the Pride parade, it will be cold enough that some might want sweaters under their rain coats, Scotland said. 

Sunday's daily high is set to be 16 C, but could be even cooler with the rain.

Less rain north of Toronto

In a bit of good news for cottagers, areas to the northeast of Georgian Bay could receive less rain.

"This unseasonably strong low pressure is expected to track just south of the Lower Great Lakes into the northeastern United States by Sunday," the alert says, adding, "This is a track that is quite uncommon during the summer."

The Greater Toronto Area has already been hit with stormy weather this week that disrupted public transit and knocked out power.

After between 30 and 50 mm of rain fell Monday night and into Tuesday morning, some city intersections lacked working street lights for the morning commute. Flooding also disrupted Go Transit service and closed some city roads.


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