Snow-porch

This has now been remedied by enclosing the hatchway within a commodious snow-porch; and, instead of the steam and vapour of the inhabited deck being condensed into moisture about the hatchway as heretofore, it now meets the downward rush of cold air in the porch, and is there converted into minute particles of snow; this porch also diminishes the escape of heat.

Source: wiktionary

Some days of gales there were, when Panig-pah had to lie up in the igloo, the world beyond its inner circle being a blinding, smothering fog of flying snow ; the dogs, sheltered in the snow-porch, curled up and resting.

Source: wiktionary

She had scarcely stepped through the snow-porch, when she returned and reported that a big white bear was fighting the dogs.

Source: wiktionary