Blizzard.
An Antarctic blizzard is a high southerly wind generally accompanied by clouds of drifting snow, partly falling from above, partly picked up from the surface. In the daylight of summer a tent cannot be seen a few yards off: in the darkness of winter it is easy to be lost within a few feet of a hut. There is no doubt that a blizzard has a bewildering and numbing effect upon the brain of any one exposed to it.
Brash.
Small ice fragments from a floe which is breaking up.
Cloud.
The commonest form of cloud, and also that typical of blizzard conditions, was a uniform pall stretching all over the sky without distinction. This was logged by us as stratus. Cumulus clouds are the woolly billows, flat below and rounded on top, which are formed by local ascending currents of air. They were rare in the south and only formed over open water or mountains. Cirrus are the "mare's tails" and similar wispy clouds which float high in the atmosphere. These and their allied forms were common. Generally speaking, the clouds were due to stratification of the air into layers rather than to ascending currents.
Crusts.
Layers of snow in a snow-field with air space between them.
Finnesko.
Boots made entirely of fur, soles and all.