The correct answer is - Westerlies.
The rain and snow on the Pacific coast of the North American continent are brought the winds known as the Westerlies. These winds move from west towards east throughout all of the year, thus the name Westerlies, They are on of the global wind pasterns, and they are present in the mid latitudes in both the North Hemisphere and the South Hemisphere. They are in a low pressure locations, squeezed between the two high pressure zones on the south and north of them.