Color classification of temperature early warning

Warning signal of blue 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 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 an impact on agriculture and may continue.

Cold wave blue warning signal: within 48 hours, the minimum temperature drops by more than 8℃, the minimum temperature is less than or equal to 4℃, and the average wind power on land can reach more than 5; Or it has dropped by more than 8℃, the lowest temperature is less than or equal to 4℃, and the average wind force is above 5, and it may continue.

Warning signal of blue gale: it may be affected by gale within 24 hours, and the average wind power can reach above 6, or the gust wind power can reach above 7; Or have been affected by strong winds, the average wind force is 6-7, or the gust is 7-8, which may last.

Yellow warning

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.

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:/kloc-within 0/2 hours, the snowfall will reach more than 6 mm, or it has reached more than 6 mm and the snowfall continues, which may have an impact on traffic or agriculture and animal husbandry.

Yellow warning signal of cold wave: within 24 hours, the minimum temperature will drop by more than 10℃, the minimum temperature is less than or equal to 4℃, and the average wind power on land can reach above 6. Or it has dropped above 10℃, the lowest temperature is less than or equal to 4℃, and the average wind power reaches above 6, which may continue.

Yellow warning signal of strong wind: it may be affected by strong wind within 12 hours, and the average wind force can reach above 8 or gust above 7; Or it has been affected by strong winds, with an average wind force of 8-9, or a gust of 9- 10, and may continue.

High temperature yellow warning signal: the maximum temperature will be above 35℃ for three consecutive days.

Lightning yellow warning signal: lightning activity may occur within 6 hours, which may cause lightning disaster.

Yellow warning signal of frost: within 48 hours, the minimum ground temperature will drop below 0℃, which will have an impact on agriculture, or it has dropped below 0℃, which will have an impact on agriculture and may continue.

Fog yellow warning signal: Fog with visibility less than 500m may appear within 12 hours, or fog with visibility less than 500m and greater than 200m has appeared and will continue.

Yellow warning signal of road icing: When the road surface temperature is lower than 0℃, precipitation will occur, and road icing that may affect traffic may occur within 12 hours.

Yellow warning signal of smog: One of the following situations may occur in the next 24 hours: (1) smog with visibility less than 3000m and relative humidity less than 80%. (2) Visibility is less than 3,000 m, relative humidity is greater than or equal to 80%, and PM2.5 concentration is greater than 1 15 μ g m3 and less than or equal to 150 μ g m3. (3) The visibility is less than 5000m, and the concentration of PM2.5 is greater than150μ g m3 and less than or equal to 250μ g m3.

Yellow warning signal of forest fire danger: the fire danger grade is high, and the meteorological grade of forest fire danger is Grade III. Combustible materials in the forest are easy to burn and forest fires are prone to occur.

Orange alert

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.

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.

Snowstorm orange warning signal: The snowfall will reach10mm or above within 6 hours, and the snowfall will continue, which may or has already had a great impact on traffic or agriculture and animal husbandry.

Cold wave orange warning signal: within 24 hours, the minimum temperature drops 12℃ or above, the minimum temperature is less than or equal to 0℃, and the average wind power on land can reach 6 or above. Or it has dropped above 12℃, the lowest temperature is less than or equal to 0℃, and the average wind power reaches above 6, which may continue.

Warning signal of orange gale: it may be affected by gale within 6 hours, and the average wind force can reach more than 10, or the gust wind force can reach more than 1 1; Or it has been affected by strong winds, the average wind force 10~ 1 1, or gust1~12, and it may continue.

High temperature orange warning signal: the maximum temperature will rise above 37℃ within 24 hours.

Orange lightning warning signal: lightning activity is likely to occur within 2 hours, or it has been affected by lightning activity and may continue, so lightning disaster accidents are more likely.

Orange warning signal: within 24 hours, the ground minimum temperature will drop below -5℃, which has a serious impact on agriculture, or it has dropped below -5℃, which has a serious impact on agriculture and will continue.

Fog orange warning signal: fog with visibility less than 200 meters may appear within 6 hours, or fog with visibility less than 200 meters and greater than or equal to 50 meters has appeared and will continue.

Orange warning signal of road icing: When the road surface temperature is lower than 0℃, precipitation will occur, and road icing which has great influence on traffic may occur within 6 hours.

Hail orange warning signal: Hail weather may occur within 6 hours, which may cause hail disaster.

Drought orange warning signal: It is predicted that the comprehensive meteorological drought index will reach severe drought in the coming week (meteorological drought will occur once every 25 to 50 years), or more than 40% of crops in a county (district) will suffer from drought.

Haze orange warning signal: One of the following situations may occur in the next 24 hours: (1) Haze with visibility less than 2000m and relative humidity less than 80%. (2) Visibility is less than 2,000m, relative humidity is greater than or equal to 80%, and PM2.5 concentration is greater than or equal to 150 μ g m3 and less than or equal to 250 μ g m3. (3) Visibility is less than 5000 meters, and PM2.5 concentration is more than 250 μ g cubic meters and less than or equal to 500 μ g cubic meters.

Orange warning signal of forest fire danger: the fire danger grade is high, and the meteorological grade of forest fire danger is grade 4. Combustible materials in the forest are easy to burn, which is easy to cause forest fire and spread quickly.

Orange warning signal: within 24 hours, the ground minimum temperature will drop below -5℃, which has a serious impact on agriculture, or it has dropped below -5℃, which has a serious impact on agriculture and will continue.

red alert

Typhoon red warning signal: It may be or has been affected by tropical cyclones within 6 hours, and the average wind force along the coast or land reaches more than 12, or the gust reaches more than 14 and may continue.

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

Blizzard in red warning signal: The snowfall will be above 15mm within 6 hours, or it will be above 15mm and the snowfall will continue, which may or has had a great impact on transportation or agriculture and animal husbandry.

Cold wave red warning signal: within 24 hours, the minimum temperature will drop by more than 16℃, the minimum temperature is less than or equal to 0℃, and the average wind power on land can reach above 6; Or it has dropped above 16℃, the lowest temperature is less than or equal to 0℃, and the average wind power reaches above 6, which may continue.

Gale red warning signal: It may be affected by gale within 6 hours, and the average wind force may be above 12 or gust 13; Or it has been affected by strong winds, with the average wind force 12 or gust 13 and may continue.

High temperature red warning signal: The maximum temperature rises above 40℃ within 24 hours.

Red warning signal: There is a great possibility of lightning activity within 2 hours, or strong lightning activity has occurred and may continue, so there is a great possibility of lightning disaster.

Thunderstorm and gale red warning signal: It may be affected by thunderstorm and gale within 2 hours, with an average wind force of 12, accompanied by strong lightning; Or have been affected by thunderstorms and strong winds, with an average wind force of 12, accompanied by strong lightning, and may continue.

Red warning signal: Fog with visibility less than 50m may appear within 2 hours, or fog with visibility less than 50m has appeared and will continue.

Road icing red warning signal: When the road surface temperature is lower than 0℃, precipitation will occur, and road icing which has great influence on traffic may occur or has occurred within 2 hours.

Hail red warning signal: There is a great possibility of hail accompanied by lightning within 2 hours, which may cause serious hail disaster.

Drought red warning signal: It is predicted that the comprehensive meteorological drought index will reach extreme drought in the coming week (meteorological drought will occur once every 50 years or more), or more than 60% of crops in a county (district) will suffer from drought.

Smog red warning signal: One of the following situations may occur in the next 24 hours: (1) smog with visibility less than 1000m and relative humidity less than 80%. (2) Visibility is less than 1000m, relative humidity is greater than or equal to 80%, and PM2.5 concentration is greater than 250 μ g m3 and less than or equal to 500 μ g m3. (3) Visibility is less than 5000 meters, and PM2.5 concentration is more than 500 micrograms cubic meters.

Forest fire risk red warning signal: The fire risk is extremely high. The meteorological grade of forest fire danger is 5. Combustible materials in the forest are easy to burn, and forest fires are prone to occur, and the fire spreads very quickly.