How does a rain shadow form

In a rain shadow it's warm and dry. On the other side of the mountain, it's wet and cool. when air mass moves from a low elevation to a high elevation, it expands and cools. this air forms clouds, which drop rain and snow,as it rises up a mountain. After the air mass crosses over the peak of the mountain and starts down the other side,The air warms up and the clouds dissipate. That means there is less rainfall.

A rain shadow is a patch of land that has been forced to become a desert because mountain ranges blocked all plant-growing, rainy weather. On one side of the mountain, wet weather systems drop rain and snow. On the other side of the mountain—the rain shadow side—all that precipitation is blocked.

In a rain shadow, it’s warm and dry. On the other side of the mountain, it’s wet and cool. When an air mass moves from a low elevation to a high elevation, it expands and cools. This cool air cannot hold moisture as well as warm air. Cool air forms clouds, which drop rain and snow, as it rises up a mountain. After the air mass crosses over the peak of the mountain and starts down the other side, the air warms up and the clouds dissipate. That means there is less rainfall.

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