What are the national typhoon warnings from low to high?

Legal analysis: Typhoon is a kind of 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. The arrangement from low to high is blue, yellow, orange and red.

First, the blue warning of typhoon is the lowest level signal, which means that the average coastal or land wind force is above 6 or the gust is above 8 within 24 hours and may continue.

Second, the yellow warning of typhoon is the second low-level signal, which means that within 24 hours, the average wind force along the coast or land will reach above 8, or the gust will reach above 10 and may continue.

3. Typhoon orange warning is the third low-level signal, indicating that the average coastal or land wind force is above 10 or gust is above 12 within 12 hours and may continue.

4. The red warning of typhoon is the highest level signal, which means that within 6 hours, the average wind force along the coast or land will reach 12, or the gust will reach 14 and may continue.

Extended data

Typhoon warning is divided into four warning levels: blue, yellow, orange and red. Among them, red warning signal is the most terrible. Generally, after the release of this level, it shows that the typhoon has landed strongly in the local area, which will bring some damage. In addition, there is a white warning signal, which is only set up in Guangdong Province.

After the general typhoon warning is issued, the relevant areas will stop large-scale indoor and outdoor gatherings, suspend classes and suspend business (except for special industries). Before the typhoon comes, people should try to stay in windproof and safe places. Water operations and passing ships in relevant waters should return to Hong Kong to take shelter from the wind, strengthen port facilities, and prevent ships from anchoring, grounding and collision.

Every time a typhoon lands, it is almost accompanied by heavy rain, and the precipitation can reach four or five hundred milliliters. Before the typhoon comes, we should reserve daily food, articles and drinking water.

Legal basis: On August 16, 2004, China Meteorological Bureau issued the Trial Measures for Issuing Early Warning Signals of Sudden Meteorological Disasters, in which typhoon early warning signals are divided into four grades: blue, yellow, orange and red.