What is a weather forecast forward?

On the earth, the temperatures in different regions are different. This difference leads to the constant flow of air currents, namely cold air and warm air. When a large area of ??cold air and warm air meet, an obvious interface will be formed between them. We call this interface a "front", also called a "front".

The length of the front is roughly the same as the horizontal distance of the air mass, ranging from hundreds to thousands of kilometers. The width is much smaller than the air mass, only tens of kilometers, and the widest is only a few hundred kilometers. rice. The vertical height is equivalent to the air mass, ranging from several kilometers to more than ten kilometers. Fronts can also be divided into warm and cold, moving, and stationary.