Brief introduction of typhoon black warning signal

The black typhoon warning signal indicates that the tropical cyclone may or has affected the local area within 12 hours, and the average wind force is above 14. It's not used now.

The types of meteorological disaster warning signals have increased from three to 10, and the familiar black typhoon warning signal will be withdrawn from the historical stage. The severity and urgency of disasters, the new version of meteorological disaster warning signals are generally divided into four levels (IV, III, II and I), which respectively represent general, heavier, serious and particularly serious, and are marked in Chinese and English, which are consistent with all emergency disposal levels and colors of the country.

The original black warning signal of typhoon, rainstorm and cold wave will become history, with red as the highest level, from the original "white, green, yellow, red and black" to the present "white, blue, yellow, orange and red"; The rainstorm warning signal and cold wave warning signal were originally divided into ten kinds of sudden meteorological disaster warning signals according to "yellow, red and black".

One: Typhoon

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

Typhoon White Warning Signal Meaning: It may be affected by tropical cyclones within 48 hours.

The meaning of typhoon blue warning signal: it may be affected by tropical cyclones within 24 hours, with an average wind force of more than 6 or a gust of more than 7; Or have been affected by tropical cyclones, the average wind force is 6-7, or the gust is 7-8 and may continue.

The yellow warning signal of typhoon means: it may be affected by tropical cyclones within 24 hours, with an average wind force of more than 8 or a gust of more than 9; Or it has been affected by tropical cyclones, with an average wind force of 8-9, or a gust of 9- 10 and may continue.

The meaning of the orange warning signal of typhoon: it may be affected by tropical cyclones within 12 hours, and the average wind force may reach 10 or above, or the gust 1 1 above; Or have been affected by tropical cyclones, the average wind force 10- 1 1, or the gust112 may continue.

The meaning of typhoon red warning signal: it may be or has been affected by typhoon within 12 hours, and the average wind power can reach or reach 12 or above and may continue.

Two: rainstorm

The rainstorm warning signal is divided into three levels, which are represented by yellow, orange and red respectively.

Yellow rainstorm warning signal Meaning: There may be heavy rain in the local area within 6 hours, or heavy precipitation may continue.

Meaning of rainstorm orange warning signal: in the past three hours, the local rainfall has reached more than 50 mm, and the rainfall may continue.

Significance of the rainstorm in red warning signal: In the past three hours, the local rainfall reached more than 100 mm, and the rainfall may continue.

Three: high temperature

High temperature orange alarm

The high temperature warning signal is divided into three levels, which are represented by yellow, orange and red respectively.

High temperature yellow warning signal meaning: the weather is sultry. Generally speaking, the maximum temperature will approach or reach above 35℃ within 24 hours.

High temperature orange warning signal meaning: the weather is hot. Generally speaking, the maximum temperature will rise above 37℃ within 24 hours.

High temperature red warning signal Meaning: Extremely hot. Generally speaking, the maximum temperature will rise above 39℃ within 24 hours.

Four: cold

Cold wave orange warning

The cold warning signal is divided into three levels, which are represented by yellow, orange and red respectively.

Meaning of yellow warning signal of cold wave: Affected by the invasion of cold air in the north, it is expected that the local temperature will drop sharply within 24 hours 10℃ or the daily average temperature will remain below 12℃.

Meaning of orange warning signal of cold wave: Due to the invasion of cold air in the north, it is expected that the local minimum temperature will drop below 5℃.

Red warning signal meaning of cold wave: Affected by the invasion of cold air in the north, the local minimum temperature is expected to drop below 0℃.

Five: Hail

The hail warning signal is divided into two levels, which are represented by orange and red respectively.

Hail orange warning signal meaning: Hail may be accompanied by lightning weather within 6 hours, and may cause hail disaster.

Red warning signal meaning of hail: It is more likely that there will be hail with lightning weather within 2 hours, which may cause a big hail disaster.

Six: Thunderstorms and strong winds

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

Meaning of blue 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 6, or the gust is above 7 accompanied by lightning; Or it has been affected by thunderstorms and strong winds, and the average wind force has reached 6-7, or the gust is 7-8 accompanied by lightning, and may continue.

The yellow warning signal of thunderstorm and gale refers to: it may be affected by thunderstorm and gale within 6 hours, and the average wind force may reach 8 or above, or the gust is 9 or above 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.

The orange warning signal of thunderstorm and gale means: it may be affected by thunderstorm and gale within 2 hours, and the average wind power may be above 10, or the gust 1 1, 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.

Red warning signal meaning of thunderstorm and gale: it may be affected by thunderstorm and gale within 2 hours, and the average wind power can reach more than 12 with 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.

Seven: the road is frozen.

The warning signal of road icing is divided into three levels, which are represented by yellow, orange and red respectively.

The yellow warning signal of road icing indicates that there may be road icing affecting traffic within 12 hours.

The orange warning signal of road icing refers to the road icing that may have a great impact on traffic within 6 hours.

Road icing red warning signal Meaning: Road icing may occur or has occurred within 2 hours, which has a great impact on traffic.

Eight: Forest fire risk

Forest fire warning signals are divided into three levels, which are represented by yellow, orange and red respectively.

The meaning of the yellow warning signal of forest fire danger: the forest fire danger grade is three. Moderate danger, combustible materials in the forest are easy to burn and forest fires are easy to occur.

The meaning of orange warning signal of forest fire danger: the forest fire danger grade is four. Highly dangerous and combustible substances in the forest are easy to burn, and forest fires are prone to occur, and the fire spreads quickly.

Red warning signal meaning of forest fire risk: the forest fire risk rating is five. Extremely dangerous, combustible materials in the forest are easy to burn, and forest fires are prone to occur, and the fire spreads very quickly.

Nine: Fog

The fog warning signal is divided into three levels, which are represented by yellow, orange and red respectively.

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

Fog orange warning signal meaning: 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 may continue.

Fog red warning signal Meaning: Strong fog with visibility less than 50 meters may appear within 2 hours, or strong fog with visibility less than 50 meters has appeared and may continue.

Ten: Hazy weather

Haze weather warning signal, expressed in yellow. Meaning:/kloc-smog weather may occur within 0/2 hours, or it has already appeared and may continue.