 &lt;a href=&quot;http://www.sierraavalanchecenter.org/avalanche-terms/cornice&quot; title=&quot;A mass of snow deposited by the wind, often overhanging, and usually near a sharp terrain break such as a ridge. Cornices can break off unexpectedly and should be approached with caution.&quot; class=&quot;lexicon-term&quot;&gt;cornice&lt;/a&gt; fall 