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.
In winter, the sea is still relatively warm, while the land started to cool off since mid July. So in winter you have a very cold landmass next to a still rather warm ocean. The Sea Breeze usually kicks in in late morning, when the land has warmed up enough to be warmer than the ocean at the same time. It is strongest in early afternoon right after peak heating, then starts diminishing, as the water is getting a bit warmer and the land starts cooling off quickly.