I harp on this topic a lot and honestly, I think that high pressure is very underrated in the weather world. High pressure can make or break big storm, especially in the wintertime. The combination between the clockwise flow around the high and counterclockwise rotation around a low team up to usher in cold air to aid the chances of frozen precipitation on the northwest quadrant of a body of low pressure. If the high is not strong enough, then there will be a lack of cold air and rather then snow, you will get a plain cold rain.

High pressure works in three dimensions. Looking at a high from a birds eye view wind flows in two directions, clockwise and away from the high. Air flows clockwise around a high in the northern hemisphere where we live, and counterclockwise in the southern hemisphere. Additionally, air flow out, away from the center of high pressure, because objects move from areas of high pressure to areas of low pressure.

Furthermore, air under high pressure tends to sink. Therefore, sinking air inhibits the growth or even formation of clouds, allowing for fair weather days, depending on how strong the pressure is. A weak high pressure cell can have clouds and light precipitation in it's domain and is coined a "dirty high."

When it comes to temperature forecasting the flow in the horizontal, around the high, depends on its position. With winds generally flowing in a clockwise direction, to the east of a high, typically cooler air is experienced. On the flip side, on the western side of the high, milder air is painted.

As a strong winter strom develops, the position of high pressure prior to the storms impact is very important to track because that will dictate what type of precipitation will fall, rain, snow or ice.

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