Traditional Culture Encyclopedia - Weather inquiry - How to predict the weather by observing the changes of clouds?
How to predict the weather by observing the changes of clouds?
Scientists' long-term observation and practice show that the generation and dissipation of clouds, as well as the evolution and transformation among various clouds, are all carried out under certain water vapor conditions and atmospheric movement conditions. People can't see water vapor or atmospheric movement, but we can see every move of water vapor and atmospheric movement from the evolution of clouds, and water vapor and atmospheric movement play an extremely important role in weather phenomena such as rain, snow, freezing hail. For thousands of years, the working people in our country have summed up rich experiences of "knowing the sky by observing the clouds" according to the changes in the shape, direction, moving speed, thickness and color of clouds in production practice, and have compiled these experiences into proverbs. "There are hook clouds in the sky and rain in the ground": Hook clouds refer to cirrus clouds. Behind this cloud, there are often fronts (especially warm fronts), low pressure or low pressure troughs moving, which indicates that rain is coming. "Battery cloud, rain": Battery cloud refers to fort-shaped high cumulus cloud or fort-shaped stratocumulus cloud, which appears in front of the trough with low pressure, indicating that the air is unstable, and thunderstorms usually come every 8- 10 hours. "Clouds pass through clouds, and it rains": Clouds pass through clouds, which means that the moving directions of the upper and lower clouds are inconsistent, that is to say, the height and wind direction of clouds are inconsistent, which often occurs near the front or low pressure, so it indicates rain, and sometimes the wind direction of clouds is opposite to the ground, and there is a saying that "the sky changes when the clouds go against the wind". "The river pig crosses the river, and it rains heavily": The river pig refers to the broken rain clouds in the nimbostratus. If such a cloud appears, it means that there is enough water vapor in nimbostratus, shanghai dawn. Sometimes broken rain clouds are blown to cloudless places by strong winds, and it is also a precursor to rain to see clouds like pigs floating across the "Milky Way" at night.
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