This was for an AOPA piece on "inversion layer" weather patterns. The idea was to show the same scene in daylight and darkness, in order to show how the fog appears. (Or something like that!) I figured I'd use a graph line that depicts an actual inversion layer as the separator between the two scenes. (In case you were wondering what was up with the odd line.) This image differs slightly from the version AOPA published, in that the fog is less exaggerated. They wanted me to turn up the volume on the fog effect to drive home the point, but I preferred it this way. :)
There was also an animation for this that shows the fog accumlate as the sun sets, and shows windsock reflect the changes in wind. I'll post it as soon as I get some sort of a production line in place to turn my anim stuff into blog-ready stuff that still looks acceptable.