Foehn wind there is no precipitation, implies there must be other mechanisms. 2) Isentropic draw-down (the draw-down of warmer, drier air from aloft): When the approaching winds are insufficiently strong to propel the low-level air up and over the mountain barrier, the airflow is said to be 'blocked' by the mountain and only air higher up near mountain-top level is able to pass over and down the lee slopes as foehn winds. These higher source regions provide foehn air that becomes warmer and drier on the leeside after it is compressed with descent due to the increase in pressure towards the surface.
Weather risk management "Accounting for weather derivatives" provides guidance on accounting for weather derivatives that are not exchange–traded. Entities that enter into speculatives or trading non–exchange derivatives contracts should apply the intrinsic method. Weather risk management Weather risk management is a type of risk management done by organizations to address potential financial losses caused by unusual weather. Energy, agriculture, transportation, construction, municipalities, school districts, travel, food processors, retail sales and real estate are all examples of industries whose operations and profits can be significantly affected by the weather. For example, unusually mild winters diminish consumer demand for heating and erode the profit margins