The original post: /r/askscience by /u/laceyaa on 2024-11-04 03:56:10.

When you look up sometimes the clouds move so slow that they appear to be stationary, and sometimea they’re very fast. What causes this, and what does it mean? Does speed predict weather? Are certain speeds more common at certain times of the day? Does this change throughout the year? Any insight would be much appreciated.