What is Atmospheric Pressure?

Atmospheric pressure, also known as barometric pressure, is the weight of the air pressing down on Earth’s surface. It is measured in units such as inches of mercury (inHg) or millibars (mb) and varies based on altitude and weather conditions.

Changes in atmospheric pressure play a crucial role in weather patterns. High pressure generally brings clear skies and stable conditions, while low pressure is associated with storms, strong winds, and severe weather. Rapid drops in pressure can indicate the development of tornadoes and hurricanes.

In storm shelter planning, understanding atmospheric pressure is vital. Tornadoes typically form in regions of intense low pressure, where rising warm air fuels storm rotation. Safe rooms and underground shelters provide critical protection against these powerful weather systems.

Barometers are used to measure atmospheric pressure, helping meteorologists predict weather changes. Monitoring pressure trends can give early warnings for approaching storms, allowing individuals and communities to prepare for severe weather events.