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Canada’s weather this week continues to be dominated by one Pacific low pressure system travelling from British Columbia to Newfoundland. As it does, each province will feel its effects, which will come in the form of heavy rain, severe thunderstorms, and even high heat and humidity. Here's what to expect.

Prep for more severe summer weather


Brett Soderholm
Meteorologist

Thursday, August 4, 2016, 4:48 PM - Canada's weather continues to be dominated by a single Pacific low pressure system travelling from British Columbia to Newfoundland (Scroll down for your province's detailed forecast).


KEEP ON TOP OF ACTIVE WEATHER: Visit the Alerts section of the website


As it does, many provinces will feel its effects, which will come in the form of heavy rain, severe thunderstorms, and even high heat and humidity for some.

Western Canada saw impacts from the storms during the first half of the week. By Friday, most of the active weather will have moved eastward.

Here’s a regional breakdown of this system as it tracks across the country.

British Columbia

High pressure offshore will help to clear the skies for the rest of the week, and keep temperatures close to seasonal.

Alberta

Rainfall warnings have dotted southern Alberta since Tuesday, but conditions are expected to be calmer now after an active start to the week.


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Southern / Central / Eastern Ontario

Northern Ontario's storms will move out by Friday. Meanwhile, the heat is on! Between Wednesday and Friday, high heat and humidity will be steadily building under the warm sector of this low. Daytime high temperatures will be near or above 30 C for the vast majority of the region in this time, with humidex values in the mid-to-upper 30s.

It is not until Friday afternoon/evening when the cold front from this low will cross the region, bringing with it a relatively widespread thunderstorm risk along the 401-corridor to Quebec, and as far north as Sudbury and Timmins. While it remains a bit too early yet to speculate on the severity of these storms, conditions are expected to be favourable for at least isolated severe thunderstorms in advance of the cold front.

Quebec

Much like Ontario, no significant weather is expected until late Friday/pre-dawn Saturday. Daytime high temperatures will be steadily building throughout the week, peaking on Friday, and thunderstorms should be expected Friday night into Saturday for much of the southern portion of the province.


NOT SURE WHAT TO EXPECT? Visit the Alerts section of the website for latest updates.


Atlantic Canada

Mostly fair conditions this week until the low finally ends its cross-country journey on Saturday in the Maritimes and Sunday in Newfoundland. Widespread rain is expected over the weekend, and an associated thunderstorm risk will likely be in place for the Maritimes.

In the meantime, temperatures will be quite warm, with New Brunswick forecast to have daytime high temperatures in the 30s by Friday, and Nova Scotia and PEI in the upper 20s.

As always, stay tuned to your local forecast for the most recent updates to this system and its specific impacts on where you live!

Watch Below: Even in the summer, Canadian dad puts son to winter work

Thumbnail image courtesy of Christine Newman.

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