How to classify the level of blizzard? What impact will blizzard have?

Yesterday's sudden cooling led to the phenomenon of heavy snow in some places. What is the classification of this blizzard? What impact will blizzard have on our lives?

How to classify the blizzard level

Blizzard warning is divided into four grades according to grades; One, two, three, four. The colors are blue, yellow, orange and red. The specific release standards are as follows:

Blue warning standard:/kloc-within 0/2 hours, the snowfall will reach more than 4 mm, or it has reached more than 4 mm and the snowfall continues, which may affect traffic or agriculture and animal husbandry. Yellow warning standard:/kloc-within 0/2 hours, the snowfall will reach more than 6 mm, or it has reached more than 6 mm and the snowfall continues, which may affect traffic or agriculture and animal husbandry. Orange warning standard: 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 caused great impact on traffic and agriculture. Red warning 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 already had a great impact on traffic and agriculture.

What impact will blizzard have?

Blizzard will make roads slippery, affect traffic, and may cause traffic paralysis. The raw materials needed for production can't be scheduled in time, the product department can buy them in time, and so on. In life, for example, people are inconvenient to travel and the water supply and power supply are tight.

There will be a large-scale snowstorm in the northeast

The snow in North China and other places will gradually stop, and the northeast will gradually enter the period of rain and snow concentration. Due to the deepening eastward movement of the upper trough, a shear vortex will be formed in the northeast, and a cyclone will sweep across the northeast from south to north on the ground, which will lead to the accelerated rise and fierce convergence of cold and warm air above, and the precipitation here will be very fierce.

This process in Northeast China has a large amount of precipitation and a long precipitation time. Due to the change of temperature stratification, the phase of precipitation is very complicated and many changes will occur. There is rain, sleet, snow and even freezing rain in the southeast of Inner Mongolia in the western part of Northeast China, and the snowfall is also extreme.

Western Liaoning (Fuxin and Jinzhou), southeastern Inner Mongolia (Tongliao) and western Jilin (Baicheng and Songyuan) need special attention.

The Central Meteorological Observatory continued to issue an orange warning of blizzard. It is estimated that there will be heavy snowstorms, local blizzards or heavy blizzards in southeastern Inner Mongolia, central and western Liaoning, western Jilin, central and southwestern Heilongjiang from the evening of the 7th to the 8th.

From the night of the 8th to the 9th, parts of southeastern Inner Mongolia, western Jilin and western Heilongjiang. Experienced major snowstorms and local blizzards.

Northeast China has three major influences to pay attention to this time:

① The core snowfall period in many places in Northeast China is on Monday, and the traffic impact bears the brunt. It is necessary to pay attention to the influence of road icing and snow, and the land, sea and air may be closed due to heavy rain and snow.

② Influence on power supply. The phase state of rain and snow process is complex, which is easy to cause ice and snow on power supply lines.

③ Impact on agriculture

Pay special attention to the influence of rain and snow on greenhouses. Due to the long duration of rain and snow, it is necessary to deal with the risk of damage caused by snow and ice to greenhouses.

After the snowfall, the temperature is low, which is not conducive to the growth of crops in the shed. The minimum temperature in a large area will be refreshed, and the impact of the cold wave will continue.

The Central Meteorological Observatory issued a yellow warning for cold wave. From the evening of the 7th to the 8th, the temperature will drop at 8 ~ 10℃ in parts of eastern Huanghuai, eastern Jianghuai, eastern and southern Jiangnan and central and eastern South China, and 12 ~ 14℃ in parts of southeastern Shandong, eastern Jiangsu, Shanghai, northeastern Zhejiang and western Fujian.

On the 8th and 9th, there will be a large-scale minimum temperature, hitting a new low in the second half of this year. The lowest temperature in the morning in the north is generally less than 0℃, and the lowest temperature in Jianghuai and Jiangnan is only about 5℃.

The highest temperature in the south will also drop significantly. The highest temperatures in Nanjing, Shanghai, Hangzhou, Nanchang and Guiyang will all drop to about 10℃ for the first time, especially in Shanghai and Hangzhou, which will exceed 20℃ on the 7th and will drop to about 10℃ quickly on the 8th. In South China, which has been waiting for cold air for a long time, cooling is finally coming.

The temperature has plummeted, so everyone should pay attention to adjusting clothes in time to guard against catching a cold.

Will blizzard affect the high-speed rail?

Blizzard high-speed rail may be out of service. Generally, light snow and medium snow have little effect on high-speed rail. If it is a heavy snow or blizzard, it may affect the punctual operation or shutdown of the high-speed rail.