0…1: how strongly the world's moisture controls cloudiness (deserts clear, rainforests cloudy).
−1 (clear skies) … 1 (overcast): shifts overall cloudiness.
Time for a system to change shape, seconds.
Octaves of the cloud noise.
Typical size of a weather system, metres.
Speed systems drift along the prevailing wind, m/s.
Weather systems (fronts and cloud masses) drifting with the prevailing wind.