Odd snow patterns may also created by industrial emissions. This happened to a friend of mine this morning. He lives in
Linz in a part of the city that lies in the downdraft area of the
VOEST steel mill.
On some mornings the condensation nuclei of the emissions cause considerable amounts of snow to fall there while in the rest of the city there's now precipitation at all. The snowplough teams don't seem to notice this because their headquarter is in a different part of the city and for example today they simply didn't come to do their job.
On those days it's best to just pull the handbrake and sliiiiiiiiiiide