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    Brett Anderson

    Gabrielle and Thursday Severe Thunderstorm Update

    9/11/2013, 11:02:01 AM

    Tropical storm Gabrielle has moved northwest of the Bermuda Islands and will turn more north Thursday before accelerating northeastward Friday as it starts to get picked up by the approaching cold front.


    590x393_09111852_gab


    Computer models have trended slightly west with the track of Gabrielle since yesterday and take the center of circulation over eastern Nova Scotia Friday evening or Friday night as a tropical storm.


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    West of the circulation center the wind will not be much of a factor with a period of heavy rain later Friday and Friday night.

    East of the circulation center there will be less rain, but the winds will increase out of the southeast then south with tropical storm force gusts of 70-90 km/h Friday night over eastern Cape Breton then up into the south-central coast of Newfoundland.

    This storm will be a fast mover so that the duration of the storm will likely be less than 5 hours. The fast movement of the storm will also prevent widespread flooding.

    Gabrielle should lose tropical characteristics as it crosses Cape Breton and steadily weaken as it moves up toward western Newfoundland.

    The St. John's area will get some rain and gusty winds. Highest gusts in the order of 60 to 75 km/h will likely impact the Avalon during the early morning hours of Saturday.

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    Strong cold front will bring a dramatic temperature change to eastern Canada Thursday night and Friday, but before that happens there is the threat for severe thunderstorms Thursday afternoon from New Brunswick to southeastern Quebec and down into Pennsylvania.


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    The greatest threat from any thunderstorm will be damaging winds. Lightning will also be intense.

    By Friday, afternoon temperatures across much of southern Ontario will be at least 15 degrees C. cooler than what they were for Wednesday. Just another sign that fall is on the way.

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

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