N. Avalanche is a tropical lily created by J. Craig Presnell. It has pale purple outer petals, pink to white inner petals and mottled pads. It's date of origin is 2003. It's date of publication is 2004. It's parentage is an unnamed seedling x N. ampla.

It won the 2006 IWGS Best New Waterlily of the year and Best New Tropical.