What was the weather situation during the Delta jet crash in Toronto?

According to the press conference, while Toronto had received significantly more snow than normal, the runways themselves were reported as clear at the time of the incident. Airport officials stated that the weather was clear during the landing, though there was snow accumulated on the sides of the runways. This snow accumulation may have actually helped firefighters responding to the incident, though officials did not speculate on exact causes, deferring to investigators as is standard protocol for aviation incidents.