This will be brief. I will post a full blog on this storm potential on Monday......
Computer models are coming into better agreement that a storm will quickly move northeastward through the eastern U.S. and up into parts of eastern and Atlantic Canada during the Tuesday night-Thursday time period.
Based on the current information that I am looking at, it appears that the best chance of a significant snowfall will be across extreme eastern Ontario, southwestern and central Quebec Tuesday night into Wednesday then up toward western Labrador Wednesday night into Thursday.
Based on the expected track, this system will most likely be a rainmaker (May briefly start and end as snow) for the Maritimes and Newfoundland with strong southeast winds bringing in the milder, Atlantic air.
Right now, it appears that the main energy for this storm will initially be split, which will prevent the storm from rapidly deepening as it tracks up into New England. This will also reduce the amount of moisture that gets thrown back into the cold air to the west, which means that the heavier snow area will be fairly narrow.
Some of the bigger towns & cities that could end up with a significant snowfall (15 cm or more) include....
Belleville, Ont Kingston, Ont (winds may downslope off the Adirondacks for a time, reducing the amount of snow) Have to wait and see. Cornwall, Ont Ottawa, Ont Montreal, Que Ski country north of Montreal Trois-Rivieres, Que Quebec, Que Saguenay
As you go into southeast Quebec the storm may start out as steady snow, but if the current 850 mb track ends up correct then the snow will likely mix or go to rain for a time.
Still over 48 hours from the event and plenty of time for the track and intensity to change.
Some western edge snow is also possible over the Niagara region and up toward Peterborough in Ontario.
Some Lake Ontario snow enhancement is also a possibility early Wednesday near St. Catharines, Ont.
------ Lake-effect snow wrap-up......
Still waiting as of Sunday evening for the official snowfall reports from Environment Canada. However, there are unofficial reports of 30 to as much as 70 cm of snowfall in the London, Ontario area from this most recent lake-effect storm.
Areas to the south and southeast of Georgian Bay also ended up with heavy accumulations.
Also, feel free to post your own snowfall measurements in the comment section below for any storm.
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Significant snow is likely for parts of New Brunswick this weekend.
Cold air expected to spill into eastern North America in about 10 to 14 days.
Arctic air likely to retreat well to the north as we go into early December.
Active weather pattern through next week.
My weekly update on the short- and long-range patterns.