The air continues to cool as it rises, but not as fast as before,
because the heat given off during the condensation process warms
the air. As it cools, more water drops form. When they get large
enough, they fall to the Earth in the form of rain, sleet, or
snow.
This is why the windward side of a mountain is usually wetter than
its leeward side. The highest recorded snowfall occurred on the
windward side of Mount Baker in Washington—95 feet during
the winter of 1998-99.