Banff National Park and Jasper National Park 3:44 PM MDT Thursday 14 September 2006 Snowfall warning forBanff National Park continued Heavy snowfall for Mountain Parks.A slow moving disturbance over southern Alberta will continue to bring cool temperatures and precipitation for the rest of the week. Precipitation will be mainly rain except over mountain regions where snow will dominate.Colder air from the north will continue to move into Alberta today resulting in the greatest potential for snow overnight. Further snowfall accumulations with local amounts of 10 to 20 centimetres are possible.