First, the blue warning:

1, 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.

2. Typhoon blue warning signal: it may be or has been affected by tropical cyclones within 24 hours, and the average coastal or land wind force is above 6, or the gust is above 8 and may continue.

3. Blue rainstorm warning signal: 12 hours, the rainfall will reach more than 50 mm, or it has reached more than 50 mm and the rainfall may continue.

4. Frost blue warning signal: 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.

5. Cold wave blue warning signal: the minimum temperature will drop by 8? Above c, the minimum temperature is less than or equal to 4? C, the average wind power on land can reach more than 5; Or did it drop by 8? Above c, the minimum temperature is less than or equal to 4? C, the average wind force is above 5, which may last.

6. Gale blue warning signal: within 24 hours, the average wind force may be above level 6 or gust above level 7; Or have been affected by strong winds, with an average wind force of 6-7, or gusts of 7-8 may continue [4]? .

Second, the yellow warning:

1. Typhoon yellow warning signal: 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 8, or the gust is above 10 and may continue.

2. yellow rainstorm warning signal: Within 6 hours, the rainfall will reach more than 50 mm, or it has reached more than 50 mm and the rainfall may continue. [2]?

3. 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 have an impact on traffic or agriculture and animal husbandry.

4. 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 force is above 6, and it may continue.

5. Yellow warning signal of strong wind: 12 hours, the average wind force that may be affected by strong wind can reach 8 or above, or the gust is 7 or above; 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.

6. High temperature yellow warning signal: the maximum temperature will be 35 for three consecutive days. Above C.

7. Lightning yellow warning signal: Lightning activity may occur within 6 hours, which may cause lightning disasters and accidents.

9. Frost yellow warning signal: The minimum ground temperature will drop below 0℃ within 48 hours, which will affect agriculture, or has it dropped to 0? Below c, it has an impact on agriculture and may continue.

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

1 1. Yellow warning signal of road icing: When the road surface temperature is lower than 0? C, there is precipitation, 12 hours may have an impact on traffic road icing.

12. Haze yellow warning signal: One of the following situations may occur in the next 24 hours: (1) Haze 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 more than150μ g m3 and less than 250μ g m3 [4]? .

13. Yellow warning signal of forest fire danger: the fire danger is high, the meteorological grade of forest fire danger is Grade III, and combustible materials in the forest are easy to burn and forest fires are easy to occur. [5]?

Third, the orange warning:

1. Typhoon orange warning signal: 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.

2, 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. [3]?

3. Snowstorm orange warning signal: within 6 hours, the snowfall will reach 10 mm or above, or it has reached 10 mm and the snowfall continues, which may or has already had a great impact on traffic or agriculture and animal husbandry.

4. Cold wave orange warning signal: the minimum temperature will drop within 24 hours 12? Above c, the minimum temperature is less than or equal to 0? C, the average wind power on land can reach more than 6; Or is it down 12? Above c, the minimum temperature is less than or equal to 0? C, the average wind force is above 6, and it may continue.

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

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

7. Lightning orange 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 is more likely.

8. Frost orange warning signal: The minimum ground temperature will drop to minus 5 degrees within 24 hours. Will it have a serious impact on agriculture below C, or has it already dropped to minus 5? Below c, it has had a serious impact on agriculture and will continue.

9. 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.

10, orange warning signal of road icing: When the road surface temperature is lower than 0? C, there is precipitation, and there may be road icing that has a great impact on traffic within 6 hours.

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

12, orange warning signal of drought: 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.

13. Early warning signal of haze orange: 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 2000 meters, relative humidity is more than or equal to 80%, and PM2.5 concentration is more than 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 500 μ g cubic meters.

14, orange warning signal of forest fire danger: the fire danger is high, and the meteorological grade of forest fire danger is level 4. Combustible materials in the forest are easy to burn, and forest fires are prone to occur and spread quickly.

Fourth, the red warning:

1. 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.

2. Heavy rain in red warning signal: within 3 hours, the rainfall will reach 100 mm or more, and the rainfall may continue. [3]?

3. Blizzard in red warning signal: The snowfall will be above15mm within 6 hours, or it will be above15mm and the snowfall will continue, which may or has already caused a great impact on traffic or agriculture and animal husbandry.

4. Cold wave red warning signal: The minimum temperature will drop within 24 hours 16? Above c, the minimum temperature is less than or equal to 0? C, the average wind power on land can reach more than 6; Or is it down 16? Above c, the minimum temperature is less than or equal to 0? C, the average wind force is above 6, and it may continue.

5. 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 have been affected by strong winds, the average wind force is above 12, or the gust is above 13 and may continue.

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

7. Lightning 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.

8. Thunderstorm and gale red warning signal: It may be affected by thunderstorm and gale within 2 hours, and the average wind power can reach more than 12, accompanied by strong lightning; Or it has been affected by thunderstorms and strong winds, and the average wind force is above 12 with strong lightning, and it may continue.

9. Frost orange warning signal: The minimum ground temperature will drop to minus 5 degrees within 24 hours. Will it have a serious impact on agriculture below C, or has it already dropped to minus 5? Below c, it has had a serious impact on agriculture and will continue.

10, foggy 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.

1 1, road icing red warning signal: When the road surface temperature is less than 0℃, precipitation occurs, and road icing that has a great impact on traffic may occur or has occurred within 2 hours.

12, Hail red warning signal: There is a great possibility of hail with lightning weather within 2 hours, and it may cause a large hail disaster.

13. Drought red warning signal: It is estimated 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.

14. 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.

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