noun
A mass of snow sliding down a mountain; synonymous with 雪崩 (なだれ), but explicitly includes the 雪 (snow) element.
See also: 雪崩
山では雪雪崩に注意が必要です。
In the mountains, you need to be careful of avalanches.
今年は雪雪崩の危険が高い。
This year the risk of avalanches is high.
雪崩 is the common word for avalanche; 雪雪崩 is a less common variant that explicitly includes the 雪 character, but both refer to the same phenomenon.
Compound of 雪 (snow) and 雪崩 (avalanche), literally 'snow avalanche'. The repetition of 雪 is unusual but serves to emphasize the snow component.