Weather Forecasting: "Air Masses and Fronts: Occluded Front" 1962 USAF Meteorology

more at scitech.quickfound.net "OUTLINES PRINCIPLES OF THE OCCLUDED FRONT; SHOWS HOW IT FORMS AND DISCUSSES ITS ASSOCIATED WEATHER. POINTS OUT EFFECTS OF WARM AND COLD AIR MIXTURES IN SUMMER AND WINTER." Public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and equalization. also see: The Warm Front: www.youtube.com en.wikipedia.org An occluded front is formed during the process of cyclogenesis when a cold front overtakes a warm front. When this occurs, the warm air is separated (occluded) from the cyclone center at the Earth's surface. The point where the warm front and the occluded front meet (and consequently the nearest location of warm air to the center of the cyclone) is called the triple point. There are two types of occlusion, warm and 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. A wide variety of weather can be found along an occluded front, with thunderstorms possible, but usually their passage is associated with a drying of the air mass. Additionally, cold core funnel clouds are ...
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