Weather examples during warm fronts

English name: warm front

Warm front

When the front moves, if the warm air plays a leading role and pushes the front to move to the side of the cold air mass, this will This kind of front is called a warm front. After the warm front passes, the warm air mass takes over the original position of the cold air mass. Warm fronts mostly move in Northeast China and the middle and lower reaches of the Yangtze River, and are mostly connected with cold fronts. When a warm front passes through, it will be warm and humid, the temperature will rise, the air pressure will drop, and the weather will turn to clouds and rain. Opposite the cold front. Warm fronts move slower than cold fronts and may cause continuous precipitation or fog.

Warm front weather model

In the cold air mass under the warm front, because the air is relatively humid, stratocumulus and cumulus clouds are often produced under the action of airflow convergence and turbulence. . If the raindrops falling from the warm air above the front evaporate in the cold air mass, the water vapor content in the cold air mass increases, and when it reaches saturation, cumulus and stratus clouds will form. If this saturated condensation phenomenon occurs in the ground layer near the front, frontal fog will form. The above is the general situation of warm front weather, but when the warm air is unstable in summer, cumulonimbus clouds, thunderstorms and other intermittent precipitation may also occur. In spring, when there is very little water vapor in the warm air mass, there are only some high clouds and little precipitation.

Obvious warm fronts appear less frequently in my country, and are mostly accompanied by cyclones. It generally appears in the Yangtze-Huaihe River Basin and Northeast China in spring and autumn, and in the Yellow River Basin in summer.

Warm front weather characteristics

Before crossing: controlled by a single cold air mass, low temperature, high pressure, low temperature and clear weather

During crossing: cloudy and rainy, mostly continuous Rainfall (precipitation concentrated in front of the front)

After passing through: the warm air mass controls, the temperature increases, the air pressure decreases, and the weather becomes sunny

Characteristics of warm front precipitation

It has small intensity, wide range and long duration, and often appears in temperate zones. Warm frontal precipitation occurs in front of the front.

Southern China: Warm and sunny in spring, cold and rainy in spring.