It was a record-breaking snow day in the national capital.
By Tuesday evening, Ottawa had been struck by more than 46 centimetres of snow, pushing past the Feb. 16 record of 39.6 set in 1954, and all-time single-day record of 40.6 set in March of 1947.
Environment Canada says at times snow was piling up at a rate of four centimetres an hour, and a total above 50 is likely by the time it ends.
The slick conditions made roads treacherous, with countless cars stuck in the snow along with city transit buses.
Ottawa roads manager Luke Gagne says it's the worst single-day volume of snow he has seen in his 25 years working for the city.