 Mountain ranges can cause a rain shadow effect, when air flow inland from the ocean and it rises, it begins to cool and after it reaches the other side of the mountain it becomes warm and evaporates.This is one of the reasons for the dry conditions in the Transverse Ranges that are furthest from the coast.The Ranges are also affected by the Santa Ana winds, a regional wind system created when air is forced from a high pressure to a low pressure, causing air to move from inland towards the ocean.