Growing up in Geelong it never snowed, although I do remember once when there was a hail storm that dumped about 2cm of hail on the ground that I could pretend it was snow. But I was 19 before I experienced my first clump of snow on the side of the road driving through a National park in Victoria (AUS).
Now that I'm living in Vancouver (BC), snow happens much less frequently than in Ontario. But I'm still intrigued and fascinated by it.
Last night about 5cm of snow fell. I stood out on the balcony of our apartment and watched it fall. Watched it twist and move in the wind. It wasn't too long before I set up my camera to take some photos. It seemed like the thing to do.
There is a street lamp a few metres from the balcony and I wanted to use a long time exposure, in order to capture the dance of the snowflakes as they fell. When I went through the photos tonight, I noticed something that intrigued me. In the images where the snow was falling fast, so the flakes were captured as long streaks on the image, there was a regular variation in the brightness along the length of the streaks.
And this is another example where some of the streaks show banding and others don't appear to:
Canon 300D, 70-200mm f4L lens @ f5.6 + 0.5 seconds + ISO 400
I can only summise that it is caused by some sort of strobe effect from the sodium street lamp. Although I haven't been able to find any reference to this on-line. Although I may have used the wrong search terms.
Here are a couple of other images showing the banding effect - the street light illuminating the flakes is just above the upper left corner of these shots: