A huge winter storm is expected to descend across parts of Ontario and Quebec later on Wednesday and quickly spread across Atlantic Canada over the next two days, prompting Environment Canada to issue a flurry of weather warnings.

Environment Canada updated its weekly forecast for Quebec on Tuesday, and Montreal has been hit with a weather advisory. A powerful snowstorm is set to hit the city starting late Wednesday, bringing between 20 and 35 cm of snow — much more than the 15 cm originally forecast just a day earlier.