Typhoon warning color grading white

Typhoon warning signals are divided into five levels, which are represented by white, blue, yellow, orange and red respectively. The most serious is red. Typhoon White Warning is the lowest typhoon warning signal in Guangdong, indicating that it may be affected by tropical cyclones within 48 hours. After 1990s, 1-5 warning signal was adopted, and in 2006, it was changed to typhoon blue, yellow, orange and red warning signal, and the warning signal in Guangdong Province was white.

Typhoon (English: Typhoon) is a tropical cyclone. Tropical cyclone is a low-pressure vortex that occurs on the surface of tropical or subtropical ocean, and it is a powerful and profound "tropical weather system". In China, tropical cyclones in the South China Sea and the Northwest Pacific are classified into six grades according to the maximum average wind speed near the bottom center, and the wind near the center reaches 12 or above, which is collectively called typhoon.

What are the warning signals for typhoons?

1, blue warning signal

The criteria for issuing a blue warning signal are that it may or has been affected by tropical cyclones within 24 hours, the average coastal or land wind force is above 6, or the gust is above 8 and may continue. After the blue warning signal is issued, the government should prepare for typhoon prevention; Stop open-air collective activities and aerial work; Return to Hong Kong to avoid the wind; Reinforce the structure and so on.

2. Yellow warning signal

The criteria for issuing a yellow warning signal are: it may be or has been affected by tropical cyclones within 24 hours, the average wind force along the coast or land is above 8, or the gust is above 10 and may continue. After the yellow warning signal is issued, the government should prepare for typhoon emergency; Stop indoor and outdoor large gatherings and aerial work; Strengthen port facilities; Reinforce or demolish buildings, and don't go out at will.

3, orange warning signal

The criteria for issuing an orange warning signal are: within 12 hours, it may be or has been affected by tropical cyclones, the average wind force along the coast or land reaches 10 or above, or the gust 12 or above and may continue. After the orange warning signal is issued, the government should do a good job in typhoon emergency rescue; Stop large-scale indoor and outdoor gatherings, suspend classes and stop work; Return to Hong Kong to take shelter from the wind and strengthen port facilities; Reinforce or demolish buildings, don't go out at will, transfer dangerous personnel, etc.

4. red warning signal

The standard issued by red warning signal is that within 6 hours, it may or has been affected by tropical cyclones, and the average coastal or land wind force 12 or gust 14 is above and may continue.