Mark Hoover, CDC/NIOSH. Mark D. Hoover is a senior research scientist in the Division of Respiratory Disease Studies at the U.S. Centers for Disease Control and Prevention (CDC), National Institute for Occupational Safety and Health (NIOSH), in Morgantown, West Virginia.
This attracts the air from the valley, creating a breeze that blows from the valley floor up towards the top of the mountain. Often birds known as raptors, such as eagles, hawks, condors and vultures, float on these breezes to preserve their energy. This wind pattern is known as a valley breeze.
Even if there isnt much of a gradient wind, a light land breeze normally develops as the air moves out over the relatively warmer water. Some days, when the winds are blowing quite strong from off the land, a sea breeze will not develop. It takes certain conditions to produce a sea breeze.