1. Moist Air Encounters a Mountain: When moist air from the ocean or other sources approaches a mountain range, it is forced to rise over the terrain.
2. Cooling and Condensation: As the air rises, it cools due to lower atmospheric pressure at higher altitudes. This cooling causes the air to become saturated with water vapor. As the air continues to cool, the water vapor condenses into tiny water droplets, forming clouds.
3. Precipitation: The condensation process leads to the formation of clouds and, eventually, precipitation. This precipitation is what gives the windward side of the mountain its characteristic wet climate.
4. Dry Air on the Leeward Side: The air that has lost its moisture on the windward side then flows over the mountain summit and down the leeward side (the side sheltered from the prevailing wind). This air is now dry and warm, creating a rain shadow effect on the leeward side, often resulting in a dry climate.
In summary: The windward side of a mountain is wet because the air is forced to rise, cool, and condense, leading to precipitation. This process is known as orographic lift.
