There are a number of excellent resources available to you on the web, we've listed a few of them here:
Avalanche.org - One stop shop for comprehensive avy info.
Interactive Backcountry Tour - Test your decision making skills in this pretend backcountry outing.
Current Avalanche Bulletins - Forecasts and bulletins compiled by the Cyberspace Avalanche Center (CSAC).
Avalanche Incidents - Learn from past avy incidents. What was done right or wrong?
Splitboard.com Avy Forum - Share your local avy observations and post questions here.
National Weather Service Homepage - Your comprehensive weather information resource.