A similar situation can occur on a mountain. Most of the time the winds blow in the valley. Valley winds during the daytime would blow slowly up the mountain Fig. In the early morning or night, winds would blow down the mountains as the radiational effect of the sun disappeared. The mountain wind was a strong drainage wind caused by cool and dense air flowing down the mountain. The piling of the air at the base of the mountain sometimes produced strange effects such as pulsating winds.
Chapter 11, Whiteman. Creates dust storms; can aggravate brush fires due to dried out vegetation; can "fan" existing fires. Dust Devil: a swirling column of air common to the hot, dry desert. Created by a strong updraft during the heat of the day, usually under a clear sky. The diameter can range from 10 feet to as much as feet and the vortex can reach from less than feet to several thousand feet high. Unlike a tornado, the dust devils winds increase with height. Can also occur between buildings or other objects, that create a swirling motion due to forced wind flow.
Haboob: a desert wind that creates blinding sandstorms. Introduction to winds. How do winds form? Wind classification. Types of winds. The Coriolis effect? Land and sea breeze. Mountain and valley breeze.
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