How do frontal cyclones judge weather conditions?

Judging the nature of the front In the two low-pressure troughs of the frontal cyclone, it is enough to use the wind direction inside the cyclone to determine the moving direction of the airflow. If the airflow is from low latitude to high latitude (the active airflow is warm), then the front is warm, otherwise it is cold. Generally speaking, in frontal cyclones in the northern hemisphere, the warm front is on the right, the cold front is on the left, and the frontal cyclones in the southern hemisphere are the opposite.

Let's talk about the understanding of frontal cyclone:

Cyclone and front were originally two relatively independent weather systems. But sometimes around the cyclone, due to the deformation of the isobar, a trough of low pressure will be formed at the edge of the low pressure, and a front will be formed in this trough of low pressure, which will lead to the two weather systems of cyclone and front appearing in the same area, and both of them will evolve and change together. This composite weather system is a frontal cyclone.

In fact, if we understand the respective laws of front and cyclone, the front cyclone is also very simple: the weather in the low-pressure center can be explained by the cyclone weather law (low pressure and rainy, high pressure and little rain), and the surrounding area can be explained by the front weather law (but pay attention to the weather difference between confrontation and warm front). Rain, snow and strong winds appeared during the crossing, and the temperature dropped after the crossing; There is continuous precipitation when the warm front crosses the border, and the temperature rises after crossing the border)