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.