On Sunday, November 22, the government weather agency urged Ottawans to be prepared for the snowy conditions ahead.
Brief freezing rain is also possible overnight on Sunday.
The statement will last until 10 p.m. Sunday.
"Travel is expected to be impacted due to moderate to heavy snow", they said.
"Snow is beginning to spread across the region this morning and will continue to fall through this evening".
The agency explained that a snowfall warning is issued when "significant snowfall is expected". "Visibility may be suddenly reduced at times in heavy snow".
"This is tracking to be our first winter event of the year", city spokesperson Eric Holmes said in an interview with CP24 Saturday evening. It will be out. "It'll be clearing ice and making the road safe", he said.
Sunday morning is starting out wintery at -3 C, but Mother Nature is saving the best for later.
A "snowfall warning" is in effect for Ottawa and Gatineau, with 15 to 20 centimetres of snow expected to fall tonight and Monday. Amount 2 cm. High 2 C.