Clouded vision

Today I looked out the window and saw dense fog hanging over the trees at the end of the meadow (there's a meadow!) But the view was crystal clear in all other directions and I began to think it looked more like smoke -- people do burn brush and construction scraps here, but there was so, so much of it; it didn't seem like it could be just that.

As I watched it started to billow (not waft) out into the meadow, hanging together densely and not dissipating or spreading out like fog. I opened the window to listen but couldn't hear any crackling, so I just waited for it to reach me. It took about a minute and when it came I took a breath...of cool, clean mountain air. And then it was just a foggy day.