How to judge which is a warm front and which is a cold front?

Regardless of the northern and southern hemispheres, the frontal cyclone has a cold front on the left and a warm front on the right.

1. Warm front refers to the front that is pushed by warm air to move to the side of cold air mass during the front movement. After the warm front crossed the border, the warm air mass occupied the position of the original cold air mass. Warm fronts are mostly active in northeast China and the middle and lower reaches of the Yangtze River, and are often accompanied by cold fronts. When the warm front crosses the border, it is warm and humid, the temperature rises, the pressure drops, and the weather turns cloudy and rainy. Not a cold front. The warm front moves slower than the cold front, which may cause continuous precipitation or fog.

Second, the front formed by the active movement of cold air mass to warm air mass is called cold front. Cold front is the most common front in China, which can be moved to all parts of the country. Because of the different configurations and moving speeds of the cold front and the upper trough, the distribution of clouds and precipitation near the cold front is obviously different, and some of them mainly appear behind the front; Others mainly appear in the front. Cold front is the front produced when the cold air mass plays a leading role in the front movement and pushes the front to move to one side of the warm air mass. A cold front is what people often call a cold air front. It is Depth Charge with cold air heading south, and it is the most common weather system that affects China, especially in winter. Every few days in winter, a cold air invades the inland from northwest and north China. When the cold front crosses the border, it will be accompanied by the increase of northerly wind, the increase of air pressure and the decrease of temperature, which will sometimes cause rain and snow and even cause heavy rain in summer. Generally, after the cold front crosses the border, the local area will be controlled by cold high pressure, and the weather will become sunny.