Friday, February 13, 2015

Windy and cold weekend for Quebec & Ontario

A Notre-Dame-de-L'Ile-Perrot Public Works tractor takes advantage of a break in the snow to clear away some of the huge piles from fire hydrants. It has snowed everyday in February in Montreal with 33cm (13 inches) at Trudeau Airport but as much as 40cm (16 inches) across the south shore and off island. More is forecast this weekend. (ValleyWX)
Low pressure that brought us another 10cm (4 inches) of snow on Thursday is now well east of Quebec in the north Atlantic. Winds have increased this morning in southern Quebec as the storm deepens in the Atlantic. High pressure will be over us today with sunshine, but bitterly cold with a high around -18C (0F). Factor in a northwest wind of 30-50km/h and windchill values will be in the minus 30's. Currently L'Ile Perrot sits at -24C (-11F) with a windchill of -35C (-30F). It is -24C at Trudeau Airport and -27C in Ottawa. All around metro Montreal, including New England and Ontario, windchill and extreme cold warnings are in effect. The criteria is different by province so while Montreal is just as cold, we have no special mention to highlight the danger. All I can say is bundle up all weekend.

Another clipper low will dive across Lake Ontario tonight and Saturday with another period of snow and blowing snow for southern Ontario and Quebec. A general 5-7cm is likely, very similar to Thursdays system. As that low reaches the Gulf of Maine it will bomb out becoming a major storm. Eastern New England, including Boston, and Atlantic Canada will see blizzard conditions on Sunday with heavy snow, over 30cm (1 foot) and winds in excess of 100km/h. Coastal flooding is possible from Massachusetts into Nova Scotia. The storm will also pull down very cold air across Quebec. Temperatures this weekend will be frigid around -16C (4F) for highs in Montreal with very strong winds all weekend. Montreal will remain on the edge of the coastal storm with clearing skies on Sunday but windy and cold. No warm air is on the horizon through at least the middle portion of next week.

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