The triangles are in blue and the semicircles are in red, or both are purple (mixing both red and blue colours together). On a synoptic chart, occluded fronts are represented by semicircles and triangles positioned next to each other. A heighthorizontal cross section of the cold front depicts interaction between warm and cold air masses, which results in the generation of a cumulous cloud. Occluded fronts bring changeable weather conditions. In this video, we will take a quick look at what exactly a cold front is, how it forms, and what type of weather it produces. These occur at the point where a cold front takes over a warm front or the other way around. There’s going to be moisture from the Gulf of Mexico. On coloured weather maps, a cold front is drawn with a solid blue line with blue triangles. The cold front will move into the northern Plains starting on Tuesday, and that will trigger some rain along with some cooler temperatures. Often more rain will fall in the few minutes the cold front passes than it will during the whole passage of a warm front.Īs the cold front passes, the clouds roll by and the air temperature is cooler.Ĭold fronts are shown on synoptic charts by a solid line with triangles along the front pointing towards the warmer air and in the direction of movement. These fronts are linked to low pressure systems. When the warm air is pushed upwards, cooling and condensing will be rapid forming steep cumulonimbus clouds bringing heavy rain, very strong winds and possible thunder and lightning. As weve said before, cold fronts occur when a large mass of cold air enters into a region that has warmer air. It can also bring rain, thunderstorms or gusty winds. As soon as the cold front passes, the weather temperature starts becoming cooler and can drop by 4 degree Celsius or even more. The cold air is following the warm and gradually undercuts the warmer air. Cold fronts normally occur when a huge mass of cold and chilly air meets a mass of warm air, and the chilly air starts advancing on the warm air. These are usually associated with depressions.Ī cold front is the transition zone where a cold Pm air mass is replacing the warmer Tm air mass. On coloured weather maps, a warm front is drawn with a solid red line with red semicircles. cold kld adjective Word forms: comparative colder, superlative coldest 1. Warm fronts are shown on synoptic charts by a solid line with semicircles pointing towards the colder air and in the direction of movement. At the warm front, these clouds are low altitude, layered stratus clouds. The vapour then condenses to form clouds. These are formed when warm Tropical maritime air rises over a mass of cold Polar maritime air.Īs the air rises, it cools and contracts, which means it cannot hold as much vapour.
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