The two main weather charts in common use include

There are two main types of weather maps commonly used, namely, the height map is an isoline map and the ground map is an isobar map.

Weather map is a special map filled with simultaneous meteorological observation records in various places, which can reflect the weather conditions in a certain area. There are two main types: ground weather map and high-altitude weather map (isobaric map). Weather chart can show the distribution of various weather systems and weather phenomena and their relationships, and it is a basic tool for analyzing and judging weather changes and making weather forecasts. In addition, related auxiliary charts such as heat map, profile map, variable map and single station map are sometimes collectively referred to as weather map. ?

Weather charts are generally divided into three categories: ground weather charts, high-altitude weather charts and auxiliary charts. If classified according to its nature, it can be divided into: live analysis chart. A weather map drawn according to actual observation records. Forecast chart. According to the results of weather analysis or numerical weather forecast, draw the weather situation forecast map or weather distribution forecast map for the next 24, 48 and 72 hours. Historical weather map. An analysis chart of historical data printed and published according to the actual situation.

In addition, according to the needs, it is sometimes possible to draw the average distribution map and the abnormal distribution map of the average value of a meteorological element in different time periods (such as ten days, months and years).

The high-altitude weather map is also called the high-altitude isobar map or the high-altitude map. A chart used to analyze the upper-air weather system and atmospheric conditions. The height map of isobar surface is filled with observation records of potential height, temperature, temperature dew point difference, wind direction and wind speed of each sounding station or anemometer station on isobar surface.

According to the numerical values of related elements, isoline and isotherm are analyzed, and various weather systems are marked. The contour lines on the isobaric surface map indicate the spatial distribution of the isobaric surface at a certain moment, and reflect the position and influence range of weather systems such as high altitude low pressure trough, high pressure ridge, cut-off low pressure and blocking high pressure.