Contours of methane cloud opacity per km at 0.8 µm over a period of 8 Earth days in Uranus atmosphere, derived from the microphysical model as a function of time (expressed in terrestrial days) and for a constant K_eddy (p ≥ 0.4 bars)= 0.5 m² s⁻¹. The cloud condensation starts by day 16, when saturation reaches values close to 1.08. The cloud based is localized close to 1.24 bars, and the total cloud opacity is ∼0.2 in the visible. Dashed white lines represent the 0.4, 1 and 2-bar levels.