After a milder weekend, Environment Canada is telling Ottawans to brace for "another blast of winter weather" Tuesday.

A "significant snowfall" will likely replace Monday's mix of rain and snow in Ottawa this evening, with nearly 10 centimetres of powder expected by Tuesday night, Environment Canada is forecasting.

The first snow of the season could make its appearance late Saturday into Sunday morning, thanks to a "low-pressure system approaching from the south," Environment Canada said on Friday.