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Weather radar chart Reflecting the size and density of raindrops in clouds, it can usually be used to judge the distribution and variation of precipitation in a short time. The unit of radar echo intensity is dBz value, from small to large, reflecting the color on the graph from green to red or even purple. The larger the reflectivity value, the stronger the echo.

relative humidity It is an important indicator of the moisture content in the air. The unit is%. It is obtained through manual observation or automatic weather station monitoring. The value ranges from 0 to 100. The smaller the value is, the drier the air is. 100% means that the moisture is nearly saturated. Generally, it exists in rainy or foggy weather.