Air masses are large bodies of air that have roughly the same temperature and humidity throughout. When air masses move from the areas they form in, to other areas, they can collide and form weather fronts in the places they meet. That can lead to major changes in the weather.
To better understand air masses & weather fronts…
LET’S BREAK IT DOWN!
Air Masses Play a Big Role in Weather
Air masses are large bodies of air that have similar temperature and humidity. These air masses are moved around the atmosphere by prevailing winds that blow in one direction. At the boundaries between air masses, weather fronts form. Weather fronts cause changes in the weather such as rain, storms and wind. Meteorologists study air masses and weather fronts to help make predictions about the weather.
Characteristics of Air Masses
Air masses take on the characteristics of where they were formed. Throughout the Earth’s surface, there are about 20 different air masses. Air masses that form over the poles tend to be cold. Whereas air masses that form near the equator tend to be warm. Air masses that form over water tend to be wet. These air masses move around in the atmosphere due to prevailing winds.