Avalanche Size Definitions

Data Code

Avalanche Destructive Potential

Typical Mass

Typical Path Length

D1 Relatively harmless to people > 10 tons 10 meters
D2 Could bury, injure or kill a person 102 tons 100 meters
D3 Could bury and destroy a car, damage a truck, destroy a wood frame house, or break a few trees 103 tons 1,000 meters
D4 Could destroy a railway car, large truck, several buildings, or a substantial amount of forest. 104 tons 2,000 meters
D5 Could gouge the landscape. Largest snow avalanche known. 105 tons 3,000 meters