system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why is it that it can rain heavily for days on end yet it seems like the rain clouds don’t get smaller?
gpt
There are a few reasons. One is that you only see the bottom of the rain clouds, particularly if they're nimbostratus ones. They may be getting smaller in ways you can't see. Another is you might also be seeing many huge rain clouds crossing the sky if they're traveling along a front, and not just one. There are also occasions where you will be directly under where the rain clouds are forming due to how the air masses are mixing overhead in a stationary front.