What happens when hot and cold air masses meet?
When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses. This type of front is called a warm front. It generates nimbostratus clouds, which can result in moderate rain.
When a warm air mass moves over a cold air mass?
In a warm front, a warm air mass slides over a cold air mass. In a cold front, a cold air mass slides under a warm air mass. An occluded front has three air masses: cold, warm, and cold.
What happens when a warm air mass replaces a cold air mass?
Warm Front: transition zone from cold air to warm air. A warm front is defined as the transition zone where a warm air mass is replacing a cold air mass. Warm fronts generally move from southwest to northeast and the air behind a warm front is warmer and more moist than the air ahead of it.
What happens to the warm air mass in an occluded front?
Occluded Front A warm air mass pushes into a colder air mass (the warm front), and then another cold air mass pushes into the warm air mass (the cold front). The warm air rises as these air masses come together. Occluded fronts usually form around areas of low atmospheric pressure.
What is the difference between warm and cold air masses?
In general, cold air masses tend to flow toward the equator and warm air masses tend to flow toward the poles. This brings heat to cold areas and cools down areas that are warm.
How do weather fronts move?
They usually move from west to east. Cold fronts move faster than warm fronts because cold air is denser, meaning there are more molecules of material in cold air than in warm air. As they overtake cold air masses, warm fronts move slowly, usually from north to south.
What weather is associated with a low pressure system?
A low pressure system is a whirling mass of warm, moist air that generally brings stormy weather with strong winds. When viewed from above, winds spiral into a low-pressure center in a counterclockwise rotation in the Northern Hemisphere.
What is the symbol for a warm front on a weather map?
The symbol that is used to identify a warm front on a weather map is a red line with half circles that point in the direction in which the warm front is moving. The line represents the leading edge of the warmer air mass.