What chart is the main tool used by countries around the world to make weather forecasts?

Weather maps are the main tool used by countries around the world to make weather forecasts.

Weather maps refer to special maps filled with meteorological elements at the same time in various places. On the base map of the weather map, the locations of cities and measuring stations, as well as major rivers, lakes, mountains and other geographical landmarks are filled in.

Meteorological science and technology personnel conduct analysis based on weather analysis principles and methods to reveal the main weather systems, distribution characteristics and mutual relationships of weather phenomena. Weather maps are an important tool for meteorological departments to analyze and forecast weather.

Weather maps are divided into ground weather maps and high-altitude weather maps. The main levels are such as 850 hPa, 700 hPa, 500 hPa, 300 hPa, 200 hPa and other weather maps. The upper and lower levels are at the same time. By cooperating with it, you can understand the three-dimensional spatial structure of the weather system. You can use weather maps in different ranges as needed. In our country, we usually use weather maps in the Eurasian range, and sometimes in the Northern Hemisphere, or at low latitudes (30°N─30°S). ) map or a small map of a certain province or region for auxiliary analysis.