What do the red and orange warnings mentioned in the weather forecast mean?
(1) Blue rainstorm warning signal
Standard:/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.
(2) Yellow rainstorm warning signal
Standard: The rainfall will reach more than 50 mm within 6 hours, or it has reached more than 50 mm and the rainfall may continue.
(c) An orange rainstorm warning signal
Standard: within 3 hours, the rainfall will reach more than 50 mm, or it has reached more than 50 mm and the rainfall may continue.
(4) Rainstorm red warning signal
Standard: within 3 hours, the rainfall will reach 100 mm or above, or it has reached 100 mm and the rainfall may continue.
Typhoon warning signals are divided into four levels, which are represented by blue, yellow, orange and red respectively.
(1) Typhoon blue warning signal
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.
(2) Typhoon yellow warning signal
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.
(3) Typhoon orange warning signal
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.
(4) Typhoon red warning signal
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.
Blizzard warning signals are divided into four levels, which are represented by blue, yellow, orange and red respectively.
(1) Blizzard Blue Warning Signal
Standard:/kloc-The snowfall will reach more than 4 mm within 0/2 hours, or it has reached more than 4 mm and the snowfall continues, which may have an impact on traffic or agriculture and animal husbandry.
(B) Blizzard yellow warning signal
Standard:/kloc-The snowfall will reach more than 6 mm within 0/2 hours, or it has reached more than 6 mm and the snowfall continues, which may have an impact on traffic or agriculture and animal husbandry.
(3) Snowstorm orange warning signal
Standard: within 6 hours, the snowfall will reach10mm or above, or it has reached10mm and the snowfall continues, which may or has already caused great impact on traffic or agriculture and animal husbandry.
(4) Blizzard red warning signal
Standard: within 6 hours, the snowfall will reach 15 mm or above, or it has reached 15 mm and the snowfall continues, which may or has had a great impact on traffic or agriculture and animal husbandry.
The cold wave warning signal is divided into four levels, which are represented by blue, yellow, orange and red respectively.
(A) cold wave blue warning signal
Standard: 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 reaches above 5. Or it has dropped by more than 8℃, the lowest temperature is less than or equal to 4℃, and the average wind power reaches more than 5, which may continue.
(2) Cold wave yellow warning signal
Standard: within 24 hours, the minimum temperature drops 10℃ or above, the minimum temperature is less than or equal to 4℃, and the average wind power on land can reach 6 or above. 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.
(3) Cold wave orange warning signal
Standard: 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 above 6. Or it has dropped above 12℃, the lowest temperature is less than or equal to 0℃, and the average wind force is above 6, and it may continue.
(4) Cold wave red warning signal
Standard: within 24 hours, the minimum temperature drops 16℃ 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 16℃, the lowest temperature is less than or equal to 0℃, and the average wind force is above 6, and it may continue.
The warning signal of gale (except typhoon) is divided into four levels, which are represented by blue, yellow, orange and red respectively.
(A) gale blue warning signal
Standard: it may be affected by strong winds within 24 hours, with an average wind force of 6 or above or a gust of 7 or above; Or have been affected by strong winds, with an average wind force of 6-7, or gusts of 7-8 and may continue.
(2) Gale yellow warning signal
Standard:/kloc-It may be affected by strong winds within 0/2 hours, with an average wind force of 8 or above or a gust of 9 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.
(3) Gale orange warning signal
Standard: It may be affected by strong wind within 6 hours, with the average wind force above 10 or gust above 1 1; Or it has been affected by strong winds, and the average wind force 10 ~ 1 1, or gust1~12 may continue.
(4) Gale red warning signal
Standard: It may be affected by strong wind within 6 hours, with average wind 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.
The high temperature warning signal is divided into three levels, which are represented by yellow, orange and red respectively.
(A) high temperature yellow warning signal
Standard: The maximum daily temperature will be above 35℃ for three consecutive days.
(2) High temperature orange warning signal
Standard: The maximum temperature will rise above 37℃ within 24 hours.
(3) High temperature red warning signal.
Standard: The maximum temperature will rise above 40℃ within 24 hours.
Lightning warning signals are divided into three levels, which are represented by yellow, orange and red respectively.
(1) Lightning yellow warning signal
Standard: Lightning activity may occur within 6 hours, which may cause lightning disasters and accidents.
(2) Lightning orange warning signal
Standard: There is a great possibility of lightning activity within 2 hours, or it has been affected by lightning activity and may continue, so there is a great possibility of lightning disaster.
(3) Lightning red warning signal
Standard: There is a great possibility of lightning activity within 2 hours, or strong lightning activity has occurred and may continue, and there is a great possibility of lightning disaster.
Frost warning signals are divided into three levels, which are represented by blue, yellow and orange respectively.
(1) Frost blue warning signal
Standard: If the minimum ground temperature drops below 0℃ within 48 hours, it will have an impact on agriculture, or if it has dropped below 0℃, it will have an impact on agriculture and may continue.
(2) Frost yellow warning signal
Standard: within 24 hours, the ground minimum temperature will drop below minus 3℃, which has a serious impact on agriculture, or it has dropped below minus 3℃, which has a serious impact on agriculture and may continue.
(3) Frost orange warning signal
Standard: within 24 hours, the ground minimum temperature drops below minus 5℃, which has a serious impact on agriculture, or has dropped below minus 5℃, which has a serious impact on agriculture and will continue.
The fog warning signal is divided into three levels, which are represented by yellow, orange and red respectively.
(1) foggy yellow warning signal
Standard: 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.
(2) Fog orange warning signal
Standard: Fog with visibility less than 200m may appear within 6 hours, or fog with visibility less than 200m and greater than or equal to 50m has appeared and will continue.
(3) Fog red warning signal
Standard: Fog with visibility less than 50 meters may appear within 2 hours, or fog with visibility less than 50 meters has appeared and will continue.
The warning signal of road icing is divided into three levels, which are represented by yellow, orange and red respectively.
(A) road icing yellow warning signal
Standard: When the road surface temperature is lower than 0℃ and precipitation occurs, road icing may affect traffic within 12 hours.
(b) orange warning signal for road icing
Standard: 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.
(3) The road is frozen in red warning signal.
Standard: When the road surface temperature is lower than 0℃, precipitation occurs, and road icing that has a great influence on traffic may occur or has occurred within 2 hours.
The hail warning signal is divided into two levels, which are represented by orange and red respectively.
(1) Hail orange warning signal
Standard: Hail weather may occur within 6 hours, which may cause hail disaster.
(2) Hail red warning signal
Standard: There is a great possibility of hail within 2 hours, which may cause a large hail disaster.
The drought warning signal is divided into two levels, which are represented by orange and red respectively.
(A) the orange warning signal of drought
Standard: It is estimated 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.
(2) Arid red warning signal
Standard: It is estimated that the comprehensive meteorological drought index will reach the extreme drought in the coming week (meteorological drought once every 50 years), or more than 60% of crops in a county (district) will suffer from drought.
The smog warning signal is divided into three levels, which are represented by yellow, orange and red respectively.
(1) Yellow warning signal of smog
Standard: One of the following circumstances 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 3000m, 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) Visibility is less than 5000m, and PM2.5 concentration is greater than150μ g/m3 and less than or equal to 250μ g/m3.
(2) Haze orange warning signal
Standard: One of the following circumstances 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 2,000 m, relative humidity is greater than or equal to 80%, and PM2.5 concentration is greater than 150 μ g/m3 and less than or equal to 250 μ g/m3. (3) Visibility is less than 5000m, and PM2.5 concentration is more than 250μ g/m3 and less than or equal to 500μ g/m3.
(3) Smog red warning signal
Standard: One of the following circumstances may occur in the next 24 hours: (1) Haze 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 5000m, and PM2.5 concentration is more than 500μ g/m3.