How many levels of typhoon red warning?

Typhoon red warning is a four-level warning.

Typhoon red warning signal is the highest level of typhoon warning signal, with four-level warning and five-level warning in Guangdong Province. Typhoon red warning signal is an early warning signal made by the meteorological department through meteorological monitoring before the arrival of the typhoon. The standard is that it may or has been affected by tropical cyclones within 6 hours, and the average coastal or land wind force 12 or gust 14 is above and may continue. Remind people to avoid typhoons, and industrial and commercial enterprises should try their best to reduce the losses caused by typhoons.

Typhoon warning signal is an early warning signal used by relevant departments to issue typhoon disaster warning according to relevant laws and regulations. Typhoon warning signals are divided into four levels, which are represented by blue, yellow, orange and red respectively. On August 16, 2004, China Meteorological Bureau issued "Trial Measures for Issuing Early Warning Signals of Sudden Meteorological Disasters", in which typhoon early warning signals are divided into four levels: blue, yellow, orange and red, but some provinces and cities classify them according to their own characteristics.

Meteorological definition of typhoon

Typhoon is a kind of tropical cyclone. Typhoons often bring strong winds, heavy rains and storm surges. Meteorologically, according to the definition of the World Meteorological Organization, tropical cyclones with sustained wind speed above 12 (i.e. 32.7m to 41.4m per second) are called typhoons or hurricanes.

The word "typhoon" has the pronunciation of "gale" in China Cantonese, which was translated into typhoon in China after being spread abroad. It is also said that it evolved from "Fengtai" in Minnan dialect. Typhoons usually form in tropical areas (such as the North and South Pacific, the North Atlantic and the Indian Ocean) 3-5 latitudes away from the equator, and their movements are mainly affected by large-scale weather systems, and eventually dissipate at sea, or degenerate into temperate cyclones, or dissipate after landing.

From the classification, typhoons with winds above 12 are divided into three grades, while hurricanes have more grades and higher upper limits. A first-class hurricane is equivalent to a typhoon or a strong typhoon, a second-class hurricane is equivalent to a strong typhoon, a third-class hurricane is equivalent to a strong typhoon or a super typhoon, and a fourth-class hurricane and a fifth-class hurricane are equivalent to a super strong typhoon.

In China, tropical cyclones in the northwest Pacific are classified into six grades according to the maximum average wind force near the bottom center, in which the wind force is 12 or above, which is collectively called "typhoon". Typhoon can be divided into general typhoon (maximum wind 12- 13), strong typhoon (maximum wind 14- 15) and super typhoon (maximum wind ≥ 16).

The above content reference: Baidu Encyclopedia-Typhoon red warning signal