January 30th.
Our country will experience the most complicated Spring Festival weather since 2008."
The topic is on the hot search.
It is reported that it started yesterday (January 31).
The central and eastern regions of our country began to suffer.
The heaviest rain and snow since 2009.
10 provinces will have blizzard or heavy snowfall, Henan, Hebei, Shandong, Liaoning, Hubei and other places.
The daily precipitation or cumulative snowfall is extreme, and the five provinces of Henan, Hubei, Anhui, Hunan, and Guizhou are extreme.
Freezing rain will occur.
The weather system has the characteristics of wide rain and snow coverage, long duration, large range of freezing rain, and extreme cumulative precipitation in some areas, which will have a significant impact on travel and traffic in view of the current Spring Festival travel period.
Previously, the relevant departments predicted that there will be 9 billion people during the Spring Festival this year, and the total number of commercial passenger traffic such as railways, highways, waterways, and civil aviation will exceed 1.8 billion, a year-on-year increase of about 40%, and all three data have hit a record high, which can be called the busiest Spring Festival transportation in history.
From the perspective of time, the impact of rain and snow will last from the middle and late part of this week to the beginning of next week, which is a critical period for the Spring Festival; From a regional point of view, no matter how the heavy snowfall area changes later, the core influence areas of rain and snow include central regions such as Hubei and Henan, which are important hubs of north-south and east-west transportation in China.
Let's turn our attention back to Shanghai
Compared with various forms of precipitation such as rain, snow, sleet, and freezing rain in Jiangsu, Anhui, Hunan, etc., the precipitation in Shanghai is mainly rain. In the context of the competition between cold and warm air, a Jianghuai cyclone formed in the lower reaches of the Yangtze River, causing continuous rain in Shanghai on Saturdays and Sundays. Especially on Sunday, when the transition to a weekday is overpowered, winds are stronger, rain is stronger, and temperatures fluctuate significantly. It is expected that next Monday, the weather will gradually return to calm as the Jianghuai cyclone moves. The rain is expected to stop next Thursday. Due to the continuous penetration of cold air in the future, the temperature will remain between 2 8 next week.
Why yes
The heaviest rain and snow since 2009.
1. The complexity of the rain and snow process is manifested in the diversity of precipitation forms and the complex transformation of rain and snow states. According to the current forecast, the middle and lower reaches of the Yangtze River and the southern part of the Yangtze River are dominated by rainfall, accompanied by large-scale thunder and lightning activities. The northern region will experience rain and snow transformation, especially in the central and eastern parts of the country on the 3rd and 4th, the heavy snowfall will be very large, and some areas may even have extremely heavy snowfall; At the same time, there is also large-scale freezing rain in some areas. In addition, there may be frequent snow and rain transitions in Jianghan, western Jianghuai, western Hunan, and eastern Guizhou, and the meteorological pattern is extremely complex.
Second, the complexity is also reflected in the wide range of freezing rain. This will be the most freezing rain affecting the provinces since this winter, February 1-4, southern Henan, Hubei, northern Anhui, central and northern Hunan, eastern Guizhou and other parts of the phenomenon of freezing rain.
Third, the possible adjustment of the heavy snowfall area is also the complexity of this process. On the one hand, the reason for the strong rain and snow process is that the water vapor conditions are excellent, because the position of the subtropical high is northerly, which slows down the eastward movement of the southern branch trough, so that the southwest warm and humid airflow and southerly water vapor continue to move northward through the water vapor channel of the southern branch trough and the edge of the subtropical high. On the other hand, the dynamic conditions of precipitation are also extremely favorable, there is a joint influence of the south branch trough and the north branch trough in the high altitude, and a deeper high-altitude trough is formed in the later stage, which is more conducive to the formation of a wide range of snowfall, and at the same time, a Jianghuai cyclone will be formed near the ground, which absorbs a large amount of water vapor like a "suction pump", providing dynamic lifting conditions for heavy snowfall.
Why this rain and snow
How long does it last?
Mainly because of the "tug-of-war" of cold and warm forces. On the 31st, the strength of cold air in China is not very strong, and there is continuous cold air replenishment in the later period, at the same time, water vapor is also endless, and the cold and warm air forces are equal, forming a confrontation situation, thus causing long-term and large-scale rain and snow weather. On the contrary, if the cold air is strong, like the last cold wave, it will push the rain and snow southward quickly, and the impact will not last long.
What should I do when the Spring Festival is frozen with rain, snow and ice?
Road travel, rail travel, air travel, ......
Let's take a look at the diagram below
Reporter: Chen Yueyang Editor: Xu Yuelin Information: Shanghai Weather Release, China Weather Network, Youth Shanghai WeChat***Cover Picture: Picture Worm Creativity**Please indicate that it is from Shanghai Jing'an's official WeChat.
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