First, if you are going to go into the back country, take an avalanche awareness course. You must have and know how to use a tranceiver, avalanche probe, and shovel. If someone is caught in an avalanche, seconds count and you can't depend on a quick response from emergency services if you are in the back country. Email Teton County Search and Rescue or your local back country ski retailer for more information.
NOAA Weather / All-Hazards Radio just recently began broadcasting avalanche warnings on behalf of the Bridger-Teton National Forest Avalanche Center. If you have a NOAA Weather Radio with an alert function, the radio will tone out whenever an avalanche warning is issued by the Bridger-Teton National Forest Avalanche Center.