Wet snow and firn pose myriad challenges, from avalanche risks to reduced surface stability for snow- and ice-based transportation. They are also an increasingly common symptom of warmer winters and earlier melt, altering seasonal runoff dynamics in mountain watersheds. However, monitoring snow and firn liquid water content remains complicated and models struggle to accurately simulate liquid water dynamics. Remote sensing techniques show promise, while facing difficulties of their own. As the climate warms, the spatial extent and timing of wet snow and firn will likely shift, driving unforeseen impacts in new places at new times. In this session, we welcome abstracts that cover any aspect of wet snow and firn, including but not limited to: modeling, remote sensing, ground observations, first- and second-order impacts, as well as the meteorological and climatic drivers of wet snow and firn across spatiotemporal scales.

• H - Hydrology