A look ahead to Labour Day 2013
Labour Day should be quite pleasant across the eastern Prairies as dry air cover the region resulting in plenty of sunshine. Farther west, it will also be sunny all the way to the foothills in Alberta, but the day will be a very warm one with afternoon temperatures getting into the lower 30s in many areas.
Moist air surging northeastward well out ahead of the cold front will lead to widespread showers and thunderstorms from southern Ontario through western New Brunswick. Thunderstorms could be locally heavy to severe Monday afternoon from eastern Ontario through southern Quebec.
Much cooler, less humid air will begin to spread over central Ontario during the day Monday as the cold front shifts east.
Expect another humid day from Nova Scotia through Newfoundland, but it should stay dry for the most part.
A weak storm off the coast could produce a few showers over Vancouver Island Monday, while the BC mainland is mostly dry.
Frost/freeze potential next week
Still some differences with the longer-range computer modeling, but it does look like there is a chance of a widespread frost/freeze across southern rural Manitoba (though probably not right in Winnipeg due to heat island effect) and perhaps northwestern Ontario (northwest and well away from Lake Superior) during the middle of next week and most likely Wednesday night (Sept. 4), as a strong high pressure system from the north builds overhead. More on this as we get closer and more confident with the strength, track and actual timing of the high pressure dome.
By the way, here are the average first frost dates for some selected locations in Manitoba and Ontario., courtesy of Veseys....
Winnipeg, Manitoba... Sept. 22 Brandon, Manitoba... Sept. 10 The Pas, Manitoba... Sept. 17 Regina, Saskatchewan... Sept. 10 Prince Albert, Saskatchewan... Sept. 4 Thunder Bay, Ontario... Sept. 15
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My latest thoughts on the weather pattern into next week
When will the cold leave the East? More storms for the West?