Cold wave warning grade

Cold wave warning is divided into cold wave blue warning signal, cold wave yellow warning signal, cold wave orange warning signal and cold wave red warning signal.

1, cold wave blue warning signal

The blue warning signal of cold wave is an early warning signal made by meteorological department before the arrival of cold wave through meteorological monitoring, reminding people to avoid cold wave and agriculture to minimize the losses caused by cold wave. Cold wave blue warning signal is the first level of cold wave warning signal.

2, cold wave yellow warning signal

Cold wave yellow warning signal is the second level of cold wave warning signal. Within 24 hours, the minimum temperature will drop by more than 10℃, the minimum temperature will be less than or equal to 4℃, and the average wind power on land will 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.

3, cold wave orange warning signal

The orange warning signal of cold wave is an early warning signal made by meteorological department before the arrival of cold wave through meteorological monitoring, reminding people to avoid cold wave and agriculture to minimize the losses caused by cold wave. Cold wave orange warning signal is the third level of cold wave warning signal.

4, cold wave red warning signal

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

Preventive measures of cold wave

The windy weather brought by strong cold air will have a great impact on social production and residents' life.

The meteorological department reminded that under the cold wave warning, ships in rivers, lakes and seas should return to Hong Kong in time; During the gale, pedestrians should pay attention to riding bicycles as little as possible and don't stay near billboards and temporary structures; Air cooling can easily cause respiratory tract, cardiovascular and cerebrovascular diseases, so residents should pay attention to prevention. Primary and secondary school students should add clothes to keep warm in time and pay attention to the safety on the way to school. Rural areas should pay attention to vegetables to keep warm and prevent freezing, and strengthen the construction of greenhouse facilities.

The arrival of the cold wave has a great influence, a wide range of influence and a great possibility of disaster. Only by taking countermeasures in advance can the relevant departments minimize the impact of the cold wave, avoid its large-scale impact, reduce its possible economic losses and damage to agriculture, and protect plastic greenhouses, fruit trees and vegetables in agriculture.

Baidu Encyclopedia-Cold Wave Blue Warning Signal