6:45 PM: No wood smoke. There is some very faint type of odor in the air. It is so faint I cannot tell what it is. It is possible it is highly diluted wood smoke from a distant source. 21 degrees.
9:00 PM: No wood smoke. The air is clear.
11:45 PM: Very faint trace of some type of odor in the air.
I cannot say there was any wood smoke this evening. But when I checked the air at 2:45 AM, it was smoky.