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Bundle up Ontario! The big cool down is here to stay

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    Digital writers
    theweathernetwork.com

    Sunday, October 20, 2013, 6:45 PM -

    Ontarians should prepare for the sharp arrival of cooler temperatures in line with October's seasonal norms. 

    After a warm start to the month, the province will be seeing seasonal temperatures and precipitation that is normal to this time of year. 

    "Considering we've been above normal for most of October, it is the coldest air of the season so far this year," said Brian Dillon, a meteorologist at The Weather Network. 

    A low pressure system is driving colder air to move south from Saskatchewan and Manitoba, and because of this cold air there is a chance for lake effect rain showers in southern Ontario Sunday, Monday and Tuesday.

    On the colder side of the low, there is a chance of snow in northwestern Ontario and Manitoba

    Saturday was the first day that southern Ontario returned to seasonal. Toronto Pearson Airport reported an overnight low of 2.8 degrees Celsius Saturday night, a little below the average of 5 degrees Celsius, but well above the record low of -7.2 degrees Celsius set in 1974. 

    Colder air has already arrived through the eastern Prairies and will be sinking south into southern Ontario by mid-week. The only difference is that southern Manitoba along the lakes and northern shores of lake Superior will see snow climb through the air, with accumulations generally at 2-5 cm. Southern Ontario at the moment, will see only rain showers.

    Visit our Alerts page to keep on top of watches and warnings.

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