katabatic wind fall wind 2019-09-02T01:48:45Z A katabatic wind during which the low temperature and increased density of a cold mass of atmospheric gas accelerates its descent. mistral papagayo envoAtmo "A fall wind is a larger-scale phenomenon than the individual-slope scale and is produced by accumulated cold air spilling down a slope or over a mountain range. The cold air often either accumulates on a plateau or other elevated terrain, or is part of an extensive cold air mass approaching a mountain range as a cold front." vardar