In the morning of 2 January 2008 there was a very large swarm of diamond dust in Tampere, Finland. Bright parhelia and a 44 degree parhelion were observed. Pillars and subparhelia were also visible.
The swarm did not originate from snow guns but precipitated from stratus clouds that drifted above the city from the direction of Lake Näsijärvi. The stratus are just visible in the right side of the image. They can be better seen in some of the other shots, taken a few kilometers eastwards just a bit earlier ( 1 )