Typhoon level color four-level order

The four-level sequence of typhoon level color is: typhoon blue warning signal, typhoon yellow warning signal, typhoon orange warning signal and typhoon red warning signal.

1, typhoon blue warning signal

It may or has been affected by tropical cyclones within 24 hours, and the average wind force along the coast or land is above 6, or the gust is above 8 and may continue.

2. Typhoon yellow warning signal

It may or has been affected by tropical cyclones within 24 hours, and the average wind force along the coast or land is above 8, or the gust is above 10 and may continue.

3. Typhoon orange warning signal

12 hours may be or has been affected by tropical cyclones, the average coastal or land wind force 10 or gust 12 or above and may continue.

4. Typhoon red warning signal

It may be or has been affected by tropical cyclones within 6 hours, and the average coastal or land wind force is above 12, or the gust is above 14 and may continue.

Meteorological definition

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.

The above contents refer to Baidu Encyclopedia-Typhoon.