Visibility IV / V
The best bright phase was half the night on both sides. Later, large clouds always flooded in front, sometimes covering the night clouds, which were at least clearly visible almost all the time. At first, night clouds occurred from west to north, later only northwest-north. From about 3 o'clock the night clouds were no longer mocking only faintly between the norm clouds. Figure 1 was taken at 00.09. Figure 2 is a 269-frame video summary of the entire observation period.
Later, another still photo with "sound irons" taken at 00.28 was added based on Pentti Arpalahti's comment.