Why does it rain more in the sierra Nevada mountain that the coastal mountain?

Rainfall is generally higher in the Sierra Nevada mountains compared to coastal mountains due to their elevation and orographic lift. As moist air from the Pacific Ocean moves inland, it rises over the Sierra Nevada, cooling and condensing into precipitation. In contrast, coastal mountains may block some of this moisture or receive less direct airflow, resulting in lower rainfall amounts. Additionally, the Sierra Nevada's greater elevation creates conditions that enhance precipitation compared to the typically lower coastal ranges.