Snow pillow
= Snow pillow
{wiki=Snow_pillow}
A snow pillow is a specialized instrument used to measure snow water equivalent (SWE) in snowpack. It typically consists of a large, inflatable or rigid reservoir filled with water, placed on the ground beneath the snowpack. As snow accumulates on top of the pillow, the weight of the snow compresses the pillow, causing water to be displaced into a connected measuring system.