How to read radar echo chart

The radar map in the weather forecast consists of a local map and irregular color blocks. The colors range from blue to green, yellow, orange, red to purple. Next to the map are the name of the radar station, time, And the data range, there is also a vertical color bar marked with numbers, the numbers are getting larger from blue to purple, and the numerical unit is marked, which is dBZ. The range of dBZ is 10-70DBZ.

On the radar chart, the color represents the echo intensity of the weather radar. The gradual change from blue to purple represents the echo intensity from small to large, and the rainfall intensity gradually increases. dBZ is called the reflectivity factor unit. The higher the value, the greater the precipitation intensity.

Generally speaking, the area corresponding to the blue echo indicates that the local area is shrouded in precipitation clouds, but no rainfall has yet occurred; the area covered by the green echo indicates that the local area is immersed in light rain; yellow to red echo The area covered by the wave has moderate to heavy rain; while the purple echo area has the highest precipitation intensity. The area is "falling" in heavy rain, or even heavy rain, and may be accompanied by severe weather such as thunder, lightning, wind, or even hail.

This is how the radar chart in the weather forecast looks.