Southern Ontario: Fall Weather Hazards Outlook for Friday, October 22, 2021

Forecast Discussion

Near-freezing temperatures will flow into parts of Southern Ontario during the early morning hours of Friday. This will bring the risk of widespread frost throughout Central, Eastern and higher elevations of Southwestern Ontario. Temperatures will moderate somewhat after sunrise so the frost risk should come to an end by mid-morning. Keep in mind this is only a preliminary map so the frost risk may extend outside of the zone as outlined on the map - we will have an updated map issued by Thursday evening if there’s any change in the data.