What are the warning signs of blizzard?

Blizzard is a kind of disastrous weather. The snowfall in 24 hours reaches 10 mm or more, which is usually called blizzard. According to the severity of snowstorm, people divide its warning signals into four types: blue, yellow, orange and red warning signal.

1. Blue warning signal

This standard means that within 12 hours, the snowfall will reach more than 4 mm, or it has reached more than 4 mm and will continue to snow. At this time, snowfall will have a certain impact on traffic or agriculture.

2. Yellow warning signal

Its standard means that the snowfall will reach more than 6 mm in 12 hours, or it has reached more than 6 mm and the snowfall continues.

3. Orange warning signal

The standard of early warning signal means that the snowfall will reach10mm or above10mm within 6 hours and the snowfall will continue.

The defense guide of the above three warning signals: the government and relevant departments should do all kinds of defense measures and not neglect their responsibilities; Transportation, railway, electric power, communications and other departments should strengthen the inspection and maintenance of roads, railways and lines, and do a good job in road cleaning and snow melting; Reduce unnecessary outdoor activities; For temporary buildings, it is necessary to strengthen the scaffolding to prevent it from being crushed by snow, and it is also necessary to drive outdoor livestock into the shed to feed.

4. red warning signal

The red warning is the most serious one, and its standard is that the snowfall will reach more than 15 mm within 6 hours, or it has reached more than 15 mm and the snowfall continues, which will or has already caused great impact on transportation and agriculture.