Hamilton’s Medical Officer of Health has issued a cold weather alert for the city, effective early Saturday morning.
An alert like this is issued when weather conditions are or anticipated to fall below -15 degrees Celsius or -20 degrees with the windchill.
Friday began with warm, springlike conditions but the cold will be making a return.
Rain is changing to snow creating icy conditions as temperatures plummet.
Surfaces like roads and sidewalks could become icy and slippery.
Overnight temperatures are expected to drop to -10 degree Celsius, with windchill values dropping below -20 degrees.
The cold weather alert will remain in effect until it is cancelled.