wind slab

wind slab

[′wind ‚slab]
(hydrology)
A type of snow crust; a patch of hard-packed snow, which is packed as it is deposited in favored spots by the wind, in contrast to wind crust.
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But while trying to reach the peak they realised they were standing on a wind slab - a tough layer of snow resting on a softer and more precarious surface.
Mr Blyth Wright, SAIS co-ordinator, said his team had said on Monday that there would be a substantial risk of avalanches in the Category Three class, with the report for the Lochaber area warning climbers that strong southerly winds had deposited fresh wind slab in sheltered locations.