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    Brett Anderson

    Pattern Change starting this Weekend

    8/12/2013, 8:46:49 AM

    The jet stream pattern across North America will undergo a change starting this weekend and into next week.


    The main change will be the breakdown of the NW Canada high pressure ridge, which has been responsible for the unseasonably warm conditions up there.

    As the above ridge breaks down, cooler and more moist air from the North Pacific will be able to return to BC and points north. Rainfall could average above-normal for the period from the northern half of BC through the Yukon and Northwest Territories.

    At the same time, the core of the above-normal temperature region will shift into eastern Canada. While I do not expect a heat wave, it will certainly be a lot warmer next week and also drier.

    For those heading down to the Southeast U.S. it still looks like a wet pattern through next week with widespread thunderstorms, especially during the afternoon and evening hours. The added clouds and thunderstorms will also keep temperatures near to slightly below normal.

    In the meantime, the Midwest through the Northeast U.S., including southern Ontario should be able to enjoy some very comfortable weather this Wednesday and Thursday . Scattered afternoon showers will be a slight issue across Quebec as the air becomes unstable with all that chilly air higher up in the atmosphere.

    The pattern also looks fairly dry across southern Ontario from Wednesday through early next week.


    The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com


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