This one is for the real snow geek’s out there!! This video is from the American Avalanche Institute. Here they pour cold coffee into a south facing slope that has begun to undergo spring like melt-freeze cycles. This is a tool forecasters utilize to help determine, where liquid water may impound, or pool, in the snow pack which can help forecast potential depth and size of wet slab activity.
://www.youtube.com/watch?v=DwvL-9frWcI