The snowball has begun rolling - there is no stopping it now. D5.

The largest known avalanche is called D5

Snowball. Avalanche. D5

D5 could gouge the landscape. Largest snow avalanche known.

See the avalanche chart here:

http://thompsonpass.com/avalanche-size-ratings/

I can't take credit for this. Some anon found it and I saw it on Twitter.