We say that "it is pouring" when there is the type of rain that has big drops and is coming down fast and for a period of time. The usual process of raining is taking place and there are not any puddles up in the clouds.
No. Cirrus clouds are very high clouds, and as a result, are composed almost entirely of ice. The suspended ice particles, though of course subject to the effects of gravity, remain aloft due to the...