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 insurance also taken into consideration. If a car dealership wanted to insure a conditional weather promotion in which new car buyers would receive a rebate if at least 2 inches of rain fell at their location on the day after Easter, the client would need to contact the insurance company about two weeks prior to the peril date. The insurer, in turn, would price the insurance policy based on weather history for that city and state on the date that is being "insured", the type of peril being covered, and the volume of sales expected during the promotion. Weather insurance Weather