whumpf

Interjection

 * 1) A dull, soft sound as of something hollow collapsing.

Noun

 * 1)  The collapsing of a weak part of the snowpack, accompanied by a whumpf noise and potentially leading to an avalanche.

Verb

 * 1)  Of snow: to collapse in this manner.
 * 2) * 1999, Colorado Avalanche Information Center, Annual Report (page 10)
 * Even by the end of the month observers in the Northern and Central Mountains were still reporting collapsing and "whumpfing" snow; conditions that typically disappear in February.
 * Even by the end of the month observers in the Northern and Central Mountains were still reporting collapsing and "whumpfing" snow; conditions that typically disappear in February.