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    Brett Anderson

    Snow Followed by Extreme Cold

    12/30/2013, 8:35:04 AM

    Here are our latest updates on the snow events coming into eastern and Atlantic Canada over the next couple of days...

    There will be an area of light to moderate snow streaming east along the Arctic boundary through central Ontario and into southern Quebec through Sunday morning. Models are not showing a lot of moisture, but it will not take that much moisture to produce over 10 cm in some areas due to the low temperatures.

    590x393_12282011_ont1


    Behind this area of snow the combination of fresh, arctic air and gusty winds will bring the AccuWeather Realfeel temperatures down to dangerous levels over the eastern Prairies and extreme NW Ontario later tonight and early Sunday.


    590x393_12282013_cold1


    We shifted the axis of heaviest snowfall with the Sunday night early Monday storm a little farther north as it appears that some warmer air aloft will work cause a mix in some areas that were projected to be all snow from yesterday.


    590x393_12282022_que2


    We currently project the heaviest snow (15-30 cm) to push through central New Brunswick and perhaps into extreme western PEI. Snow will quickly change to rain over the southern and eastern half of Nova Scotia, while the northern part of Nova Scotia will see steady snow changing over to sleet/freezing rain. The northern edge of the snow/mix line will likely run from halfway between Saint John and Fredericton to just north of Moncton very late Sunday night into Monday morning.

    There could also be a few hours of strong winds with gusts in excess of 80 km/h over extreme southern Nova Scotia later Sunday night as the strong low-level jet moves through.

    Once this storm moves by it will open the door for the Arctic invasion into the east next week. The worst of the cold for eastern Canada, especially Quebec will be from late Tuesday through Thursday.

    Ski areas should certainly take advantage of this spell of very cold air and make snow if needed.

    All-time record lows for January and perhaps all 12-months could be challenged late Wednesday night and into Thursday morning, especially over southern Quebec.

    The latest ECMWF model is not messing around and projects some serious cold!

    The ECMWF map below shows the projected surface temperatures (C.) for 7 a.m. Thursday......


    590x349_12282028_screen-shot-2013-12-28-at-3

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

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