What were the weather and runway conditions at the time of the Delta jet crash in Toronto?

According to transportation reporter Sam Sweeney, the weather was clear at the time of the crash, though Toronto had received an abnormally large amount of snow beforehand. The runways themselves had been treated and were clear for landing, although there was accumulated snow on the sides of the runways. Interestingly, this snow on the sides may have actually been beneficial, as Sweeney mentions it could have aided firefighters in their emergency response efforts. Despite challenging winter conditions leading up to the incident, the airport had taken measures to ensure the primary landing surfaces were properly maintained for aircraft operations.