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On the evening of 11 December diamond dust development near to skiresort in Sievi and in a spotlight beam a halo display was seen. Reflected Lowitz arcs ( 1 ) were rising from the parhelia, other halos were 22° halo,…

On the 5th December in Nivala water fog lay still in the air at -7 C temperature. So conditions were perfect for testing the halo gun which sprays water-kaoline mixture to initiate ice nucleation ( 1 ). The spray was…

On the 17th November I drove 250 kilometers to the town of Sotkamo to check if there were any diamond dust halos. Two weeks earlier I had made the same trip, but the snowguns hadn’t produced any halos. This time,…

On the evening of 22th December weather conditions finally changed to better. Humidity was up with temperature around -8°C. At the Louekallio ski-resort snow guns produced a crystal cloud and action lasted few hours until crystals suddenly vanished. Singly oriented…