Mini Cloud Atlas
Rain Shafts in the Mountains
I almost can hear the advocacy cry now: "Rain shafts are clouds too!" Alas, precipitation clouds cannot speak for themselves, so I must speak on their behalf. Clouds consist of innumerable droplets of condensed water vapor. Raindrops aren't so tiny, and are massive enough to fall at an appreciable pace. Still, by virtue of their liquid water content within a volume of air, a rain shaft or core is a form of cloud -- albeit a very rapidly evolving, descending version.
3 SSW Buena Vista CO (21 Jul 10) Looking WNW