Snow water equivalent (mm) that fully covers the ground (~63 %).
e-folding time for surfaces to dry, seconds.
Melt per degree above freezing, mm water equivalent per °C per hour.
How far back the ground remembers weather, seconds. Older rain and snow are forgotten.
Weather samples taken over memory (more = smoother, slower).
Standing water (mm) that makes a surface fully wet (~63 %).
How rain and snow accumulate on the ground (see Weather.surfaceAt).