A brilliant sun sets over Glengarry County, Ontario along the Quebec border, on possibly the last mild day of the year. The second photo is of fog this morning in the St. Lawrence Seaway. Believe it or not a ship in the photo is blowing its fog horn.
Big changes are in store for Ontario and Quebec beginning today. This morning is mild and foggy in the St. Lawrence Valley with a light southerly breeze. Low pressure is developing over southern Ohio and will spread north into Quebec. On the back side of this system the coldest air of this season will establish itself in the region.
Heavy rain on radar this morning will overspread eastern Ontario shortly with accumulations of 20-40mm forecast in our region. It will be all rain today but as the cold air moves in Sunday the rain showers will change to snow showers from west to east. Along the western edge of the storm a general snowfall of 10-20cm is expected from Deep River north through Algonquin Park and into the Pontiac region of Quebec. Heavy Snow warnings are in place for those regions. Accompanying all precipitation will be strong east winds that will back to the northwest Sunday and gust from 40-60km/h.
Any travel west of a line from Renfrew south and west towards the Lake Huron and Georgian Bay area should be done with caution. Once the cold air moves in late Sunday it will remain with us with lake effect snow possible in Ontario and New York. An Alberta Clipper is forecast to move through the region early in the week with some light snow in all regions. Be ready for winter driving this week.
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