9:00 PM: No wood smoke yet. Went to bed at this time. Around 12:45 AM I woke and detected a very faint odor of some kind in the air. It was not strong enough to determine if it was wood smoke. It was 80 degrees and mostly cloudy at 4:30 PM. A very nice evening.
As I went to bed earlier than usual and did not notice any smoke up until that time, this will count as a rare evening without wood smoke. There could have been wood smoke when I was not awake to notice it. There usually is smoke in the air every evening.