High pressure area
The letter H is used to stand for a high pressure area.
A high pressure area (also called a high or high-pressure) is an area where the atmospheric pressure is greater than the rest of the atmosphere.
High Pressure Area Media
Satellite image showing a high-pressure area south of Australia, evidenced by the clearing in the clouds
A surface weather analysis for the United States 21 October 2006. High pressure areas are labeled "H".
The subtropical ridge shows up as a large area of black (dryness) on this water vapor satellite image from September 2000.
The Hadley cell carries heat and moisture from the tropics towards the northern and southern mid-latitudes. It deposits drier air, contributing to the world's great deserts.
