It is currently snowing, but the sun is shining. If it were raining while sunny, I would call that a sun shower. What is the equivalent for snow?
Sun snow shower comes to mind :)
Makes sense too
The meteorological definition of a snowburst is as follows:
"A short period of heavy snowfall, say on the order of 10-14 hours or so with snowfall rates around two inches per hour and greater. It is believed that snow frequently forms and falls out within "short" distances - say hundreds of feet. There is a tendency for the larger flakes to fall out closer to the shore."
NOAA defines snowburst as:
"Very intense shower of snow, often of short duration, that greatly restricts visibility and produces periods of rapid snow accumulation."