Southern Ontario: Fall Weather Hazards Outlook for Wednesday, November 17, 2021

Forecast Discussion

Precipitation associated with a system expected to bring significant snowfall accumulation will push through the northern section of Southern Ontario early Wednesday and continue into the afternoon. For the higher elevations along the Quebec border including North Bay, Algonquin Park and Petawawa, we could be looking at several hours of freezing rain mainly during the morning hours and transitioning over to regular rain later in the day as temperatures slowly rise above the freezing mark. Up to 6mm of ice accretion is possible within this zone.

In other areas including the Ottawa Valley, Bancroft, Sundridge and Sudbury there is the risk for some freezing drizzle before the switch over to rain happens although impacts will be minimal. This freezing rain could make for some slippery driving conditions for the Wednesday morning commute in the area. Be sure to drive with caution. Some isolated power outages can’t be ruled out, but it’s unlikely given the limited ice accretion expected. Conditions will improve by late Wednesday as warmer air flows into the region.