4:30 PM: No wood smoke.
5:15 PM: No wood smoke. 24 degrees.
7:00 PM: No wood smoke yet.
8:00 PM: No wood smoke.
9:00 PM: No wood smoke.
11:00 PM: No wood smoke.
I noticed no wood smoke until I woke up and checked the air after midnight. The air was smoky at 12:23 AM. Somebody waited until very late to start a fireplace.