Monday, February 25, 2013

Another storm for Ontario & Quebec

Montreal had nearly 10cm of wet snow that made travel a little tricky on Saturday. (ValleyWX)
Montreal enjoyed a mild weekend with wet snow off and on for most of it, and very little sunshine. Trudeau Airport had about 8cm of steady wet snow on Saturday, that was quite heavy at times. This morning it remains mild at -1C, but just cold enough for a layer of thin ice beneath the dusting of snow. We should see a few breaks in the cloud today as high pressure attempts to briefly build into the region. It will be short lived as a rather large and very complex storm is taking shape over Texas. This system will lift north towards the Great Lakes over the next several days and dominate our weather from late Tuesday until the end of the week. Today and Tuesday will be quiet in southern Quebec with mild late February highs of 1 to 3C and just a few flurries this morning.

By late Tuesday deep moisture will begin to surge across Ontario and Quebec from the Texas storm. It appears precipitation will fall as wet snow mixed with rain for most locations. Amounts will be very tricky to forecast with just enough warm air to mix the snow with rain in many locations. Specific amounts, type and duration of precipitation will be further complicated by a second storm that develops along the US east coast. Both system will provide the region with precipitation well into Thursday. At this time it looks like at least 15cm for Montreal and maybe more. Warnings may be required for a large portions of the region from Ontario into Quebec, Atlantic Canada and northern New York and New England. Winds will be gusty with the system especially along Lake Ontario and the St. Lawrence Valley.

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