What are the warning signs of the weather? What do they all stand for?

The meaning of meteorological disaster warning signal

Early warning signals are composed of names, icons, standards and defense guidelines, which are divided into typhoon, rainstorm, blizzard, cold wave, gale, sandstorm, high temperature, drought, lightning, hail, frost, fog, haze, road icing and so on.

The level of early warning signals is generally divided into four levels according to the degree of harm, urgency and development trend that meteorological disasters may cause: level IV (general), level III (heavier), level II (severe) and level I (particularly serious), which are indicated by blue, yellow, orange and red in turn and marked in Chinese and English.

Meteorological disaster warning signal and prevention guide

Typhoon warning signal

Typhoon warning signals are divided into four levels, which are represented by blue, yellow, orange and red respectively.

(1) Typhoon blue warning signal

Icon:

Standard: it may be 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.

Defense guide:

1. The government and relevant departments shall prepare for typhoon according to their duties;

2. Stop outdoor collective activities and dangerous outdoor operations such as high altitude;

3. Take active measures for water operations and passing ships in relevant waters, such as returning to Hong Kong to avoid the wind or detour;

4. Reinforce structures that are easily blown by the wind, such as doors and windows, hoardings, scaffolding, billboards, etc. And cut off the dangerous outdoor power supply.

(2) Typhoon yellow warning signal

Icon:

Standard: 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.

Defense guide:

1. The government and relevant departments shall prepare for typhoon emergency according to their duties;

2. Stop large-scale indoor and outdoor gatherings and outdoor dangerous operations such as high altitude;

3. Take active measures for water operations and passing ships in relevant waters, strengthen port facilities, and prevent ships from anchoring, grounding and collision;

4. Reinforce or dismantle structures that are easily blown by the wind. Personnel should not go out at will, ensure that the elderly and children stay in the safest place at home, and the dangerous house personnel will be transferred in time.

(3) Typhoon orange warning signal

Icon:

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

Defense guide:

1. The government and relevant departments should do a good job in typhoon prevention and emergency rescue according to their duties;

2. Stop large-scale indoor and outdoor gatherings, suspend classes or suspend business (except for special industries);

3. Water operations and passing ships in the relevant waters should return to Hong Kong to take shelter from the wind and strengthen port facilities to prevent ships from anchoring, grounding and collision;

4. When strengthening or dismantling structures that are easily blown by the wind, personnel should stay in windproof and safe places as far as possible. When the typhoon center passes by, the wind will decrease or stay still for a while. Remember that the strong wind will blow suddenly, and you should continue to stay in a safe place to avoid the wind, and the people in danger should be transferred in time;

5. Relevant areas should pay attention to prevent flash floods and geological disasters that may be caused by heavy precipitation.

(4) Typhoon red warning signal

Icon:

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

Defense guide:

1. The government and relevant departments should do a good job in typhoon emergency and emergency rescue according to their duties;

2. Stop assembly, suspend classes and suspend business (except for special industries);

3. Ships returning to Hong Kong to avoid the wind should take active measures according to the situation, and properly arrange personnel to stay behind or move to safety;

4. When strengthening or dismantling structures that are easily blown by the wind, personnel should stay in windproof and safe places. When the typhoon center passes by, the wind will decrease or stay still for a while. Remember that the wind will suddenly blow, they should continue to stay in a safe place to avoid the wind, and dangerous people should move in time;

5. Relevant areas should pay attention to prevent flash floods and geological disasters that may be caused by heavy precipitation.