Related Links and other useful information
National Snow and Ice Data Center: http://nsidc.org/snow/avalanche/
Avalanche.org: http://www.avalanche.org/
Mount Washington Avalanche Center: http://www.tuckerman.org/
Canadian Avalanche Association: http://www.avalanche.ca/
American Avalanche Association: http://www.americanavalancheassociation.org/
Forest Service National Avalanche Center: http://www.fsavalanche.org/
Avalanche Physics: http://physicsweb.org/articles/world/14/3/7/1
Caltech Snow Crystals: http://www.its.caltech.edu/~atomic/snowcrystals/
WA Bentley's Snowflakes: http://snowflakebentley.com/
Check out these informative books, as well:
"Snow Sense" by Jill Fredston and Doug Fesler
"Avalanche Handbook" by Ron Perla and M. Martinelli
"Avalanche Release and Snow Characteristics" by Dick Armstrong and Jack Ives
"The ABC's of Avalanche Safety" by Ed LaChapelle and Sue Ferguson
"The Avalanche Handbook" by Dave McClung and Peter Schaerer
"Field Guide to Snow Crystals" by Ed LaChapelle
"Snow Crystals" by WA Bentley