Snowfall warnings remain in effect along the St. Lawrence Valley from Montreal to Kingston today. Heavy snow with visibility down to under 1km is now falling in Cornwall and this will rapidly spread east into Montreal early this morning. Snow will be wet and heavy and taper off rapidly this afternoon. Look for a quick 10cm of snow for most places with as much as 15cm between Montreal and the US border. This will make road conditions very poor through the middle hours of the day with low visibility and icy roads. Temperatures will be near 0C (32F) today cooling off considerably tonight down to -12C. It will also turn windy tonight, out of the northwest at 30-50km/h with a few flurries.
On Sunday look for clearing skies, but temperatures will remain cold with daytime highs of -7C, well below the normal high of plus 5C. Most of the upcoming week looks quiet with lots of sunshine and a very slow warming trend that will see daytime highs finally go above freezing by late in the week.
COASTAL STORM
There is one glitch in the forecast and that is on Wednesday. Computer models have a very large and intense coastal low forming over the open waters of the Atlantic and tracking into the Maritimes. It will bring a very strong storm to Atlantic Canada and possibly coastal New England but at this time looks to travel well south and east of southern Quebec. It will need to be monitored in case the track shifts to the west.
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