What do yellow warning, blue warning, red warning and orange warning mean?

Blue warning signal of blizzard: 12 hours, the snowfall will reach more than 4 mm, or it has reached more than 4 mm and the snowfall continues, which may have an impact on traffic or agriculture and animal husbandry.

Typhoon blue warning signal: it may or may have 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.

Blue warning signal of thunderstorm and gale: it may be affected by thunderstorm and gale within 6 hours, with an average wind force of above 6 or a gust of above 7 accompanied by lightning; Or have been affected by thunderstorms and strong winds, with an average wind force of 6-7, or gusts of 7-8 accompanied by lightning, and may continue.

Blue rainstorm warning signal:/kloc-within 0/2 hours, the rainfall will reach more than 50 mm, or it has reached more than 50 mm and the rainfall may continue.

Blue warning signal of frost: within 48 hours, the ground minimum temperature drops below 0℃, which has an impact on agriculture, or has dropped below 0℃, which has already had an impact on agriculture and may continue.

2. Yellow warning

Yellow rainstorm warning signal: The rainfall will reach more than 50 mm within 6 hours, or it has already reached more than 50 mm and the rainfall may continue.

Yellow warning signal of blizzard: 12 hours, the snowfall will reach more than 6 mm, or it has reached more than 6 mm and the snowfall continues, which may affect traffic or agriculture and animal husbandry.

Yellow warning signal of ozone: ozone with an hourly average concentration exceeding 100ppb may appear in the next 4 hours, or ozone with an hourly concentration exceeding 100ppb has already appeared and may continue.

Yellow warning of forest fire: moderate danger, combustible materials in the forest are easy to burn, and forest fires are easy to occur.

Yellow warning signal of blizzard: 12 hours, there may be snowfall affecting traffic or agriculture.

Haze yellow warning signal: Haze with visibility less than 3000m may appear within 12 hours, or haze with visibility less than 3000m has already appeared and may continue.

Yellow warning signal of typhoon: it may or may have 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, orange warning

Rainstorm orange warning signal: within 3 hours, the rainfall will reach more than 50 mm, or it has reached more than 50 mm and the rainfall may continue.

Blizzard orange warning signal: the snowfall will reach10mm or above within 6 hours, or it has reached10mm and the snowfall continues, which may or has already caused great impact on traffic or agriculture and animal husbandry.

Hail orange warning signal: there may be hail accompanied by lightning within 6 hours, which may cause hail disaster.

Ozone orange warning signal: ozone concentration exceeds 120ppb.

Orange warning of forest fire: highly dangerous, combustible materials in the forest are easy to burn, forest fires are prone to occur, and the fire spreads quickly.

Snow disaster orange warning signal: within 6 hours, there may be snowfall that has a great impact on traffic or agriculture, or there has been snowfall that has a great impact on traffic or agriculture and may continue.

Haze orange warning signal: Haze with visibility less than 2000 meters may appear within 6 hours, or haze with visibility less than 2000 meters has appeared and may continue.

Typhoon orange warning signal: it may be or has been affected by tropical cyclones within 12 hours, and the average coastal or land wind force is above 10, or the gust is above 12 and may continue.

Orange warning signal of thunderstorm and gale: it may be affected by thunderstorm and gale within 6 hours, and the average wind force can reach above 8, or the gust is above 9 accompanied by strong lightning; Or have been affected by thunderstorms and strong winds, with an average wind force of 8-9, or a gust of 9- 10 accompanied by strong lightning, and may continue.

4. Red warning

Rainstorm in red warning signal: within 3 hours, the rainfall will reach 100 mm or above 100 mm and the rainfall may continue.

Red Blizzard Warning Signal: The snowfall will reach 15mm or above within 6 hours, or it has reached 15mm and the snowfall continues, which may or has already caused a great impact on traffic or agriculture and animal husbandry.

Red Hail Warning Signal: It is more likely that there will be hail with lightning weather within 2 hours, which may cause a large hail disaster.

Red warning of forest fire danger: extremely dangerous, combustible materials in the forest are extremely easy to burn, and forest fires are prone to occur, and the fire spreads very fast.

Blizzard in red warning signal: There may be snowfall that has a great impact on traffic or agriculture within 2 hours, or there has been snowfall that has a great impact on traffic or agriculture and may continue.

Haze red warning signal: visibility is less than 5000m, and PM2.5 concentration is more than 500μ g/m3.

Typhoon red warning signal: It may or may have been affected by tropical cyclones within 6 hours, with the average wind force 12 or gust 14 above along the coast or land, and it may continue.

Thunderstorm and gale red warning signal: It may be affected by thunderstorm and gale within 2 hours, with the average wind force reaching above 10, or the gust 1 1 above, accompanied by strong lightning; Or have been affected by thunderstorms and strong winds, the average wind force 10- 1 1, or gust112 accompanied by strong lightning, and may continue.

Extended data

The official name of the color icon is the weather warning signal, which generally has four color levels: blue, yellow, orange and red, and the severity is aggravated in turn, indicating general, heavy, serious and particularly serious respectively. Blue is the lowest level warning, and red is the highest level warning.

Early warning signal classification

16 warning signals of sudden meteorological disasters: typhoon, rainstorm, blizzard, cold wave, gale, sandstorm, high temperature, drought, lightning, hail, frost, fog, haze, road icing, thunderstorm and gale, forest fire.

Release method

The competent meteorological department of the State Council is responsible for the issuance, cancellation and dissemination of national early warning signals.

The local competent meteorological departments at all levels shall be responsible for the administration of the release, cancellation and dissemination of early warning signals within their respective administrative areas.

Other relevant departments shall, in accordance with their duties, cooperate with the competent meteorological departments in the release and dissemination of early warning signals.

Local people's governments at all levels should strengthen the infrastructure construction of early warning signals, establish smooth and effective channels for the release and dissemination of early warning information, expand the coverage of early warning information, and organize relevant departments to establish emergency mechanisms and systems for meteorological disasters.

Management units of schools, airports, ports, stations, highways, tourist attractions and other crowded public places shall set up or use electronic display devices and other facilities to spread early warning signals.

The state protects the special transmission facilities for early warning signals according to law, and no organization or individual may occupy, damage or move them without authorization.

Early warning signals shall be issued uniformly.

Meteorological offices and stations subordinate to the competent meteorological departments at all levels shall issue early warning signals in accordance with the release authority and business processes, and indicate the early warning areas of meteorological disasters.

Release authority and business process shall be formulated separately by the competent meteorological department of the State Council.

No other organization or individual may issue an early warning signal to the society.

Early warning case

On June 7, 2006, Fujian Meteorological Observatory issued a rainstorm red warning signal, saying that there was still heavy precipitation in the province on June 7, with heavy rain to heavy rain in some counties and cities in Nanping, Sanming, Fuzhou and southern Ningde, and heavy rain in other areas; Due to continuous heavy precipitation, geological disasters are prone to occur in various places.

According to the forecast of Fujian Meteorological Observatory, due to the influence of weak cold air and southwest warm and humid airflow, heavy rain will continue in the central and northern parts of Fujian Province. It is predicted that there will be moderate to heavy rain or thunderstorms in Nanping, Ningde, Sanming, Fuzhou and Longyan on the 7 th, and some counties and cities will have heavy rain or heavy rain. The 24-hour rainfall can reach 50 mm to 100 mm, and the local rainfall will exceed 100 mm.

On June 8, 2006, the weather in the whole province was cloudy with moderate showers or thunderstorms, and some counties and cities in Sanming, Longyan, Fuzhou, Putian, Quanzhou, Xiamen and Zhangzhou and some counties and cities in other cities had heavy rains to heavy rains.

On June 9 and June 10, 2006, the weather in the whole province was cloudy with showers or thunderstorms, and some counties and cities in Longyan, Zhangzhou, Quanzhou and Xiamen and some counties and cities in other cities had heavy rain to heavy rain.

On June 7, 2006, the meteorological forecast and early warning level of geological disasters in Longyan, southern Sanming and northern Fuzhou in Fujian Province was Grade III. Most counties and cities in northern Sanming, Nanping and Ningde have four-level meteorological forecast and early warning of geological disasters, among which Songxi, Zhenghe, Jian 'ou, Jianyang, Shouning, Zhouning and Pingnan have five-level meteorological forecast and early warning of geological disasters, which is very likely to occur.

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