Nothing happens in weather at random, it's s just so complicated it seems that way. Short term weather fluctuations happen and appear to be more random because there's no powerful and sustained force holding it together for a longer period of time. That means different factors are able to enter a particular geographic area and fight with competing forces, often switching it up throughout the week or throughout the day.

I assume someone was teaching her how to write her own name using a piece of paper on top of the surface that these markings were found on. Weird that they try to come up with something significant.

History is full of misconceptions I can only imagine what people will think of us today in the year 4000.