whiteout

[ hwahyt-out, wahyt- ]

/ ˈʰwaɪtˌaʊt, ˈwaɪt- /

Meteorology.

a condition, found in polar regions, in which uniform illumination from snow on the ground and from a low cloud layer makes features of the landscape indistinguishable.
a condition of heavily falling or blowing snow in which visibility is very poor.

an act or instance of whiting out with a correction fluid.

a white correction fluid used for this: a bottle of whiteout.

a mistake, as in typing, that has been whited out with a correction fluid.

Origin of whiteout

1940–45; (defs 2–4) noun use of verb phrase white out; (def 1) white + (black)out

THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS.

After the Blizzard, 100 Million People Will Be Hit With Freezing Air From the North Pole |Eric Holthaus |January 3, 2014 |DAILY BEAST
For, at Penn State, the whitewash has replaced the whiteout, and the “Greatest Show” is nearing its end.

Penn State Goes Too Far in Its Purge of All Things Paterno |John Hendrickson |August 29, 2012 |DAILY BEAST
The Commissioner and the Chief Inspector were at one in concluding that the crash has occurred in a whiteout.

Judgments of the Court of Appeal of New Zealand on Proceedings to Review Aspects of the Report of the Royal Commission of Inquiry into the Mount Erebus Aircraft Disaster |Sir Owen Woodhouse, R. B. Cooke, Ivor L. M. Richardson, Duncan Wallace McMullin, and Sir Edward Somers
The term 'whiteout' has more than one meaning as being descriptive of weather conditions in snow-covered terrain.

Judgments of the Court of Appeal of New Zealand on Proceedings to Review Aspects of the Report of the Royal Commission of Inquiry into the Mount Erebus Aircraft Disaster |Sir Owen Woodhouse, R. B. Cooke, Ivor L. M. Richardson, Duncan Wallace McMullin, and Sir Edward Somers

Flying in a 'whiteout' of that description is no different from flying in thick cloud.

Judgments of the Court of Appeal of New Zealand on Proceedings to Review Aspects of the Report of the Royal Commission of Inquiry into the Mount Erebus Aircraft Disaster |Sir Owen Woodhouse, R. B. Cooke, Ivor L. M. Richardson, Duncan Wallace McMullin, and Sir Edward Somers