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atoc,ch8 - Weather chapter 8 FRONTS Cold Front If cold air...

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Weather chapter 8 FRONTS Cold Front If cold air is advancing forward lifting the warm air, then it is a cold front. - The type of precipitation that will occur along the cold front depends on the characteristics of the warm front that it is moving - If the warm air is moist and conditionally unstable, lifting ahead of the front can trigger thunderstorms. These thunder storms will often form a line called a squall line - If the atmosphere is stable, some clouds may form and there may be light rain or even no rain. - If the warm air ahead of the front is dry, no clouds will form at all Cold fronts that mark the boundary of extremely cold airmasses are called arctic fronts. Warm Front This is a boundary where the cold air is retreating and the warm air is advancing - Warm air flows northward on the east side of a cyclone and for this reason warm air fronts are usually found in this location. - If the warm air is conditionally unstable, thunderstorms may develop under the warm front. - If the warm air is stable, the clouds will be layered.
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