What role did weather conditions play in the Delta jet crash in Toronto?

Officials reported that while Toronto had received unusually heavy snowfall in the days prior to the incident, the runways themselves were clear at the time of the crash. According to the fire chief, weather conditions were clear during landing, though there was still snow accumulated on the sides of the runways. Investigators have not yet determined the exact causes of the fire during landing or what caused the aircraft to flip, so the precise role of weather remains under investigation.