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A Foehn, or Föhn (UK: / f ɜː n /, US: / f eɪ n / fayn, [2] [3] US also / f ʌ n, f ɜːr n / fu(r)n [4] [5]), is a type of dry, relatively warm downslope wind in the lee of a mountain range. It is a rain shadow wind that results from the subsequent adiabatic warming of air that has dropped most of its moisture on windward slopes (see ...
A difference in air pressure causes an air displacement and generates the wind. The Coriolis force deflects the air movement to the right in the northern hemisphere and the left in the southern one, which makes the winds parallel to the isobars on an elevation in pressure card. [1] It is also referred as the geostrophic wind. [2]
Foehn winds usually occur when the westerly wind belt moves northwards. [7]The foehn effect on the coastal plains of southeastern Australia is mostly linked with the passage of a deep low pressure system or westerly cold fronts across the Great Australian Bight and southeastern Australia that cause strong winds to reorient virtually perpendicular to some parts of the Great Dividing Range ...
Euroclydon (a cyclonic tempestuous northeast wind in the Mediterranean) Föhn or foehn (a warm, dry, southerly wind off the northern side of the Alps and North Italy. The name gave rise to the fén-fēng (焚風 'burning wind') of Taiwan). Gregale (northeasterly from Greece) Halny (in northern Carpathians) Helm (north-easterly wind in Cumbria ...
On the leeward side of the mountain, the air flowing downward is known as a foehn wind. Because some of the moisture that has condensed on the top of the mountain has precipitated, the foehn (or föhn) is drier, and the lower moisture content causes the descending air mass to warm up more than it had cooled down during ascent.
Wind chill makes it feel much colder than it really is, so it's been described as a "feels-like" number. If the temperature is 0 degrees and the wind is blowing at 15 mph, the wind chill is 19 ...
The name föhn was originally used to refer to the south wind which blows during the winter months and brings thaw conditions to the northern side of the Alps. Because föhn later became a generic term that was extended to other mountain ranges around the world that experience similar phenomena, the name "Alpine föhn" ( Alpenföhn ) was coined ...
In drier climates, “spotting” can occur, Cobb said, where the wind can pick up embers, causing them to fly and ignite dry grass. “A spot fire can jump a quarter mile from the main embers ...