Fohn wind

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Fohn (Föhn) wind

Fohn (Föhn) windclick for a larger image
Warm and dry winds descending on the leeward side of the mountain. The air falling to the floor of an adjacent valley or plain after blowing across the mountaintop warms up adiabatically. Thus, this wind is warmer than the surrounding air. In Europe, it is known as a Fohn or Föhn wind. In the United States and Canada, along the eastern slopes of the Rockies (i.e., leeward side), the Indian name Chinook is used.
foil
i. A form of metal rolled into a very thin sheet with a thickness less than 0.006 in (0.15 mm).
ii. The spanwise-trailing-edge members forming an integral part of a compound wing.
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Temperatures in Hualien and Taitung in eastern Taiwan could top 38 degrees on Saturday due to possible foehn winds - warm and dry gusts that flow down the sheltered side of mountains into valleys - the bureau said.
Foehn winds affect local weather and climate and impact agriculture (growing conditions due to temperature and humidity changes; top soil erosion), tourism (reliable spots for wind and kite surfing), artificial snow making (change of wet-bulb temperatures), air pollution (trapping pollutants in cold pools underneath the foehn layer, or sweeping them away in case of breakthrough), human health (reduction of air pollution), forest fires (intensifying them to uncontrollable extents), ground traffic (toppling trucks; snow or sand drifts; blasting of vehicles with sand and small rocks), and air traffic (closure of runways when crosswinds are too high).
The appearance of this hot, dry air was accompanied by strong western foehn winds blowing along the lee side of the Judean Mts.
These are known as Foehn winds, and their warming and drying effect - the Foehn effect - can be striking and farreaching."
The foehn winds coming from the Western Carpathians and reaching the large valleys found in the Tarnave region also have a significant contribution in terms of temperature.
These windstorms are foehn winds, same as the Rocky Mountain chinook (described in IFR, December, 2012) and the same principles apply.
Today a latent poetry echoes in the names we use to distinguish foehn winds from gravity airflows and Katabatic winds from the Khamsin.
The vineyards enjoy a mild continental climate and are exposed to the warm foehn winds. It is relatively dry and there are more than the average European hours of sunshine per year.
The bureau also added that Foehn winds -- warm and dry gusts that descend the sheltered side of mountains into valleys -- could send temperatures soaring to 36-38 degrees Celsius in eastern and southeastern Taiwan.
During long-lasting foehn winds in January, a daily mean temperature of 13.8[degrees]C was measured at station Sunndalsora (Norway) on 25 January, which was the highest daily mean temperature ever recorded in January by a weather station in Norway and is a value more commonly measured around the beginning of July.
Taitung could see the temperatures climb further due to foehn winds.