How is the weather forecast for a week measured?

In the past, people observed the weather according to temperature, cloud cover, wind direction and wind force.

At present, a variety of equipment, such as radar and rain gauge, hygrometer, and satellite cloud pictures are used to analyze the joint observation of satellites and weather stations in various countries, and so on.

Collect data through various devices, such as radar and satellite. Then use a supercomputer to analyze and calculate the future weather trend with a certain algorithm.

Because it is calculated, according to the nonlinear relationship, a little error can make a huge difference, so the weather forecast can only predict the short-term weather situation, and the long-term weather forecast may be completely inaccurate.