Sorry there haven't been many posts recently. It's the busiest time of year! Still no sunspots, by the way. That's 5 months I've been watching.
At half term, I was up in the hills above Haweswater. There was a reasonably cloud base above our heads but mist kept forming in the valley below and then rising up past us. see photo.
Here's the physics explanation that I came to:
The slopes below us were south facing and catching the warm sun.
This made the snow melt and then evaporate.
The water vapour hit the cold valley air and condensed into mist.
This was warmed by the Sun so it expanded and became less dense, thus rising.
