 buried &lt;a href=&quot;https://www.sierraavalanchecenter.org/avalanche-terms/surface-hoar&quot; title=&quot;Featherly crystals that form on the snow surface during clear and calm conditions - essentially frozen dew. Forms a persistent weak layer once buried.&quot; class=&quot;lexicon-term&quot;&gt;surface hoar&lt;/a&gt; 