sky music

I was walking down 18th St. and it seemed to me that the clouds were making something like a staff in the sky. I wondered what notes would roll by, or what kind of music cloud music is, in the traditional sense of the word cloud. I would expect it to warble inaudible tones.

My daughter asked me why water vapor floats, I did my best to answer, but I too wonder why the clouds float on a certain line, there's an invisible barrier there, almost as if someone had put painter's tape over the blue and sponged on some white. Or the reverse, depending on the day's predilection.