Diagram gives terminal fall speeds for CCN, droplets and raindrops. NOTE logarithmic ordinate. It also give the updraft speed required to keep the particle suspended.
	CCN are easy to suspend via turbulent motions; just 0.1 microns per second updraft is needed.
	Small cloud droplets need 1.0 cm/s, easily achievable by winter storms.
	Large raindrops (5mm diameter) require a fast updraft 1.0 m/s.