![]() ![]() Periods of light snow is expected to continue across eastern Ontario throughout the day. Snow slowly winds down across Ottawa on Monday, where close to 20 cm of snowfall will have likely fallen. Precipitation switches over to snow for most regions, as snowfall rates begin to ease throughout the overnight and Monday morning. Snowfall amounts of less than 3 cm are expected for most of the GTA, with a conversational dusting at most along the lakeshore. The snow line will sink back toward the Greater Toronto Area (GTA) behind the system late Sunday, with wintry precipitation pushing into Orangeville and Vaughan. Subfreezing air blowing in from the northeast will keep this an all-snow event for much of eastern Ontario, where snowfall rates will climb as high as 2-3 cm per hour through Sunday evening. The greatest risk for ice accretion from freezing rain will exist from Bancroft to Cornwall, where slick surfaces are likely and ice will coat branches and vehicles. Previous systems this season have delivered hours of freezing rain, so it’s once again possible. Periods of wet snow will begin Sunday afternoon across cottage country and eastern Ontario, wth a risk for freezing rain even as far north as Ottawa, but primarily along Highway 7. will scrape along the eastern edge of the Great Lakes through the day on Sunday, bringing rain and snow to portions of southern Ontario to end the first weekend of December. Snow starts Sunday and lingers into MondayĪ low-pressure system developing over the Midwestern U.S. People should also prepare for the potential for power outages with the heavier, wet snow and freezing rain. Motorists should expect hazardous winter driving conditions and adjust travel plans accordingly. Visibility may be suddenly reduced at times in heavy snow. Some areas could see freezing rain and ice pellets at times on Sunday. Various weather alerts are in place for cottage country and eastern Ontario, including winter storm warnings for the National Capital Region. ![]() Impacts are forecast to spill into the work week, so the Monday morning commute will be anything but smooth sailing with this amount of snowfall forecast. The Sunday evening commute will be particularly hazardous around the Ottawa area. WINTER 2024: El Niño will play a critical role in the weeks ahead As things stand now, parts of eastern Ontario including the Ottawa area stand to see 15-20+ cm of snow through Monday. Heavy precipitation is very likely as the storm creeps into the region Sunday afternoon, peaking in intensity overnight into Monday. Eastern, and parts of central, Ontario will be the collision ground of a stateside low and Gulf of Mexico moisture as we conclude the weekend and begin the work week. ![]()
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