Southern Ontario: Winter Weather Hazards Outlook for Wednesday, December 15, 2021

/

Forecast Discussion

Light to moderate precipitation will move across Southern Ontario throughout the day on Wednesday with most areas seeing around 5-10mm of rainfall. However, there is an area along the Quebec border including the Ottawa Valley and into higher elevations of Central Ontario that could see a few hours of freezing rain. This will occur around the noon hour and continue through the afternoon as we see temperatures slowly rise. The rise in temperatures will eventually lead to a switch over to regular rain towards the late afternoon and early evening.

There is some uncertainty in regards to how fast the switch over will occur which would determine the exact impacts. Right now, we’re expecting between 1-3mm of ice accretion with locally up to 4-6mm, but it should melt away quite quickly after the warm-up. Some icy road conditions are possible during the afternoon so travel with caution through the affected regions.