You can easily trigger avalanches on some steep slopes. Avalanches can get large enough to bury a car or destroy a small house (size 3).
You can trigger avalanches on many steep slopes. Avalanches can get large enough to bury a car or destroy a small house (size 3).
You can trigger avalanches on a few steep slopes. Avalanches can get large enough to bury or even kill you (size 2).