1.   But every decade or so, these archival piles grow so high that they pose a serious avalanche risk, and triage becomes necessary.

2.   Increasingly, mountain communities are trying to reduce avalanche risks, either through enforcement or education.

3.   The dry powder snow that lures skiers to Colorado is also partly responsible for the high avalanche risk.

4.   To determine avalanche risk, forecasters visually assess these layers to ascertain the stability of the resulting snowpack.

5.   An avalanche risk made the search perilous, the Royal Air Force said.

6.   Avalanche risk made the search perilous, the Royal Air Force said Wednesday.

7.   Because of the huge quantities of snow falling in higher areas, authorities said there was a high avalanche risk.

8.   Record snowfalls have led to a serious avalanche risk in many parts of the Swiss Alps, authorities warned Saturday.

9.   Skiing was banned elsewhere because of the avalanche risk.

10.   The avalanche risk in the French Alps was high.