The middle latitudes of Earth lie between 23°26'22" and 66°33'39" north, and between 23°26'22" and 66°33'39" south. The middle latitudes are dominated by wind flows that are mainly from the west. Zonal air flow in the middle latitudes means a west east flow of air.
ANSWER:
The middle latitudes are dominated by the wind flows that are mainly from the west, these winds modify the climate on the east coast.
EXPLANATION: