Sun pillar and diamond dust at Kirigamine, Nagano Prefecture The 1/3 weather forecast predicted a temperature of −8°C and 80% humidity. Since snow had been forecast until 21:00 the night before, I thought it might appear and drove out. By the time I arrived at 21:00, the snow had already stopped, but a light dusting of powdery snow had settled. At 22:00 the car’s outside thermometer read −12°C, so I went to bed hoping the temperature would keep falling. I hiked 600 m along the snowy road from the parking lot to the shooting point just after 6:00 in the morning. The morning temperature was −12°C. Mount Fuji was clearly visible. There were clouds above Yatsugatake, but at 7:20 a sun pillar appeared above them. I silently wished for it to appear below as well, and from around 7:24 the diamond dust began to sparkle. The sun pillar lasted about 15 minutes, but the diamond dust continued to glitter afterward. I had visited several times last year without success, so I was delighted to see it this time.