The Highs and Lows of Air Pressure

How do we know what the pressure is? How do we know how it changes over time? 

High & low pressure defined: How air moves at the surface

Atmospheric pressure, Definition, Measurement, & Variations

What are high and low pressure air masses? - Quora

Why is it high pressure at the pole and low pressure at the

Do Warmer Seas Make Stronger Hurricanes?

Weather: Atmospheric Pressure

The Highs and Lows of Air Pressure

Weather Basics - High and Low Pressure

High vs. Low-Pressure Systems Explained - Pilot Institute

High and low pressure - Met Office