The west coast is colder due to mountain barriers causing precipitation, while the east coast receives more rainfall from warm, moist air. Orographic uplift and mountains' orientation influence precipitation distribution between Europe and North America.
The west coast is colder due to the orientation of mountains that act as a barrier to westerly maritime winds, forcing them to rise and induce precipitation. On the other hand, the east coast receives more rainfall because the westerly winds there bring warm, moist air that leads to easier convection and rain.
Orographic uplift plays a significant role in creating the heavy cloud cover and high humidity characteristic of the marine west coast climate in North America, with cyclonic storms bringing prolonged periods of rain.
Mountains' orientation differs between Europe and North America, affecting the distribution of moist conditions and precipitation inland, with the westerly winds impacting moisture penetration differently in the two continents.
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