Föhn cloud over the Crackenback Range, near Jindabyne
The southeast Australian foehn is a westerly foehn wind and a rain shadow effect that usually occurs on the coastal plain of southern New South Wales, and as well as in southeastern Victoria and eastern Tasmania, on the leeward side of the Great Dividing Range.[1] Ranging from cool to hot (depending on the season), the effect occurs when westerly winds descend steeply from the Great Dividing Range onto the coastal slopes, whereby causing major adiabatic compression (which is the rate at which temperature decreases with altitude) and a substantial loss of moisture.[2][3][4]
The effect is known by other names, such as the Australian chinook, the Great Dividing wind, the Great Dividing foehn or simply westerly foehn. The southeast Australian foehn is distinguished by three criteria; surface winds which blow from the mountains' direction, a sharp rise in air temperature in the leeward side of the mountains, and an accompanying diminution in atmospheric moisture.[2]
Typically occurring from late autumn to spring, though not completely unheard of in the summer (particularly in eastern Tasmania),[a] the Great Dividing foehn mainly occurs when a westerly or southwesterly frontal system (including a general westerly flow) passes over the ranges, thereby providing clear to partly cloudy and relatively warmer conditions on the lee.[b][5]
^Rain Shadows by Don White. Australian Weather News. Willy Weather. Retrieved 24 May 2021.
^ abJason J. Sharples, Graham A. Mills, Richard H. D. McRae, and Rodney O. Weber. "Foehn-Like Winds and Elevated Fire Danger Conditions in Southeastern Australia". Journal of Applied Meteorology and Climatology. American Meteorological Society.{{cite news}}: CS1 maint: multiple names: authors list (link)
^Where has the rain gone in Sydney? by Ben Domensino from Weatherzone. 22 June 2022. Retrieved 23 June 2022
^"Climate and the Sydney 2000 Olympic Games". Australian Government. Australian Bureau of Statistics. 24 September 2007. Archived from the original on 10 June 2008. Retrieved 31 August 2023.
^Rain one side, heat the other in NSW by Joel Pippard. Weatherzone. 16 April 2020. Retrieved 6 October 2021
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
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