Students will learn about two types of fronts on the weather map. Fronts are lines marking the leading edge of a change in air mass or temperature. A leading edge of an air mass moves forward along a weather front. When we see an approaching front, we know that the air and temperatures behind the front can be much different form the present air mass. Fronts are usually connected to a rotation low pressure system that is producing rain or snaow.
Fronts also help to lift and cool the air, creating clouds and precipitation.
Air rotating counterclockwise around the low brings warm air from the south ahead of the low and cooler air from the north behind the center of the low. A warm front is a red line with rounded bumps on the weather map showing the leading edge of a warm air mass. The rounded warm front symbols indicate to which direction the warm front is moving. A cold front is a blue line with pointed teeth on the weather map showing the leading edge of a cold air mass. The pointed cold front symbols also indicate the direction is is moving.