I stumbled upon this sequence of three images of the South pole station.
See the Current image.
It is by far the most dramatic illustration of whiteout that I have seen.
They were taken in 2012 December, times in GMT:
Dec 24, 11:50, clear
Dec 26, 03:05, one can see far but without shadows. (Can you see the igloo?)
Dec 28, 15:20, clear
Whiteout is the holraum state.