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fall wind


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A strong downslope wind that remains cold, despite adiabatic heating (and thus differs from a föhn). It is a katabatic wind that has its origins in a pool of cold air over the high ground. The most extreme examples are the violent winds that sweep down from the Antarctic ice sheet, reaching a maximum of around 320 km h−1, and which may maintain hurricane-force winds for days or weeks on end. Fall winds are largely responsible for the record annual mean wind speed of 67 km h−1 recorded at Cape Dennison, Commonwealth Bay, Antarctica.

Subjects: Meteorology and Climatology.


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