In the middle latitudes of the northern hemisphere, a pressure cell develops over the ocean in winter and a pressure cell develops in summer.

Low; high

In Northern hemisphere, the objects move across above the earth surface and tend to move to right due to Coriolis effect. The result will be the horizontal flow of air and water forming a an almost circular pattern. This circulating air pattern in the North is a characteristic pattern in high pressure are in the North. This varies depending on the season on the North.