More snow

Heavy lake effect snow in Toronto this morning. (MTO Webcam)

Upper level low pressure is slowly spinning its way across eastern Ontario and upstate New York this morning. The result is light snow in the area moving from south to north across the valley. The heaviest snow this morning is across Eastern Ontario and in the Toronto area. The GTA snow is being generated by a narrow plume of lake effect snow bowing north off Lake Ontario and affecting the 401 corridor from the downtown west towards Oakville and tapering off after that. Local amounts may exceed 15cm in the heaviest bands.

In Montreal about 2 or 3cm fell overnight but it has since ended. Radar is showing more light snow south of the city towards Burlington and Plattsburgh so I expect more snow after lunch. The only warnings in affect today are in New York State where winter weather advisories are posted. Storm totals in that area will be 8-15cm, with 15cm in the western GTA possible and between 5-10cm total for Montreal, that would include what has fallen so far which is about 3cm. Temperatures will be relatively mild for January at about -5C today and Sunday with overnight lows near -9C. More snow is forecast Sunday before a little clearing begins on Monday. Roads may be snow covered with variable conditions across the region. Winds are gusty as well in the valley and could produce some blowing snow.