Depressions

• Depressions are low pressure areas which are caused when air rises.
• The air rises because it is warmer than air around it or it can be forced up by high land.
• As the air rises it cools and clouds form.
• This causes unsettled changeable weather.
• Depressions are often associated with fronts.
• A front is where hot air is next to cold air.
• The warm air is forced upwards, it cools and condenses causing clouds and rain.