Slush is water saturated with snow, which spatters when firmly stepped on. Slush
forms at temperatures around 5°C and has a density of approximately 0.85 kg/litre.
Wet snow is snow that will, if compacted by hand, stick together and tend to form a
snowball. Wet snow has a density of approximately 0.4 kg/litre, therefore 12mm
WED equals 30mm depth.
Dry snow is snow which can be blown if loose, or which will, if compacted by hand,
fall apart upon release. Dry snow has a density of 0.2 kg/litre, therefore 12mm WED
equals 60mm depth.