New Snowfall Map
1/12/2012, 2:17:50 AM
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We just finished putting together the latest snowfall map for the northeastern quarter of the U.S. and into eastern Canada, along with the Maritimes. There will be several parts to this complicated storm system.
There will certainly be locally heavier amounts of snowfall than what is shown downwind of Lake Huron through early Saturday morning with heavier lake-effect squalls. I will update you on those specifics later.
--------- Arctic air ready to make its move....
The leading edge of very cold air will begin to push southward into western Canada this weekend and into Monday. Temperatures on Monday in Calgary will probably not get above 20 below zero celsius.
Colder air will spread into southwestern BC late Sunday, and there is a chance of some measurable snow in Lower Mainland of BC sometime Monday or Monday, but as usual the exact track of the storm will be critical.
It looks like the very cold air will persist across most of western Canada through a good part of next week, then signs indicate that the core of the cold might retreat back toward Alaska the following week, while another piece of very cold air takes up residence over northeast Ontario and into Quebec.
The storm is over for St. John's, NL, (12 cm so far at the airport) but the winds will continue to gust with blowing snow into this evening. A webcam image from the St. John's area this afternoon showing the freshly fallen snow. Image courtesy of the city of St. John's.
Be sure to follow me on my twitter account for quick updates on the weather pattern BrettAWX
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