prevailing westerlies are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude & united states are located in the middle latitudes between 30 and 60 degrees latitude ->  prevailing westerlies are prevailing winds that move from west to east across the united states  prevailing westerlies are prevailing winds that move from west to east across the united states & wind can make air masses to move in the same direction ->  the prevailing westerlies move air masses from west to east across the united states  the prevailing westerlies move air masses from west to east across the united states & jet streams may deflect the air masses moved by the prevailing westerlies -> the prevailing westerlies move air masses from west to east accross the united states but may be deflected by the jet streams