What proportion of the water in a cloud will 'rain out'?
Or, comparing the cloud before and after it has rained, what proportion of the water is left afterwards?
I really have no idea so am just looking for an order of magnitude range, is it 50%, 1% or something tiny like 0.00001%?
Edit: I wanted to leave the specifics to the answerer, but maybe an easier question is the difference in amount of water (any form) above the surface before and after rain.