An occluded front is formed during the process of
cyclogenesis when a cold front overtakes a warm front. The two fronts curve up naturally into the point of occlusion, also known as a triple point.There are two types of occlusion, the warm and the cold. In a cold occlusion, the air mass overtaking the warm front is cooler than the cool air ahead of the warm front, and plows under both air masses. In a warm occlusion, the air mass overtaking the warm front is not as cool as the cold air ahead of the warm front, and rides over the colder air mass while lifting the warm air.
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