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From November 19th to 22nd, a new cold air is about to sweep across most of China. What is the intensity of this cold air? In addition to the wind and cooling, what kind of severe weather will occur? In the fall, there will also be a large amount of dust in China? This website invited Lin Jian, chief forecaster of the Central Meteorological Observatory, to explain in detail the impact of the cold air.
Cold air hits the wind and cools and whispers to the
From November 19th to 22nd, due to the influence of strong cold air, China will have a wide range of winds and cool weather from west to east. The temperature drop in the northern and eastern parts of Xinjiang, Gansu, northern Qinghai, Inner Mongolia, Ningxia, Shaanxi, North China, Northeast China, Huanghuai, Jianghuai, northern Jiangnan and the southwestern part of the country generally reached 4~8 °C. Among them, the temperature drop in the northern part of Xinjiang, the central and western Inner Mongolia, North China, and the north-central part of Northeast China can reach 10~14 °C.
November 19-22, the national cooling rate forecast map
"For the standards of the Central Meteorological Observatory, the cold air is still not up to the standard of cold wave, but the cooling rate in some areas is still very large." Lin Jian pointed out that in late November, China's cold air activities also entered. During the active period, although the cooling air temperature does not reach the cold wave standard, the Sanbei area still needs to prepare for the cold, and the minimum temperature in some areas will reach the lowest value in the second half of this year.
In addition to the cooling of the strong cold air, the wind will almost sweep the entire northern part of the country. The Central Meteorological Observatory estimates that there are 4 to 6 northerly winds in most parts of the Huaihe River, 8 to 9 winds in the Shankou area of ​​Xinjiang, and 11 to 12 winds in the 30-mile and Baili winds.
Since the fall of this year, China's second large-scale sandstorm weather
"On the 20th to 21st, sandstorms will occur in parts of the southern Xinjiang Basin, the central and western Inner Mongolia, the western and northern parts of Gansu, Ningxia, the central and northern Shaanxi, and the western North China." Lin Jian introduced, in her memory, this It is the second large-scale dust weather process in China since the autumn of this year. The last large-scale sandstorm occurred on November 11~12, when the entire dusty weather range was quite wide, Inner Mongolia, Ningxia, The weather in Yangsha was also observed in Shanxi, Shaanxi, southern Hebei, and northern Henan, and even in parts of Shandong and South Korea.
November 20 - 21, the national weather forecast map dust
Compared with the large-scale dust weather process from the 11th to the 12th, the scope and intensity of the dust are slightly weakened, but in the second half of the year, the situation of large-scale dusty weather in China is still rare. “In previous years, China was frequent in spring dust weather. There are two reasons for the two consecutive dust weather processes in this autumn: one is that the sand source area is very warm before the cold air comes, and there is no obvious precipitation; One is that the wind of the cold air is relatively strong, and the coverage after the dust is blown is very wide.â€
The northern part of Xinjiang will continue to rain and snow, and there will be local blizzard
The Central Meteorological Observatory predicts that snowfall will continue to occur in northern Xinjiang. It is expected that on the 19th, small to medium snow will continue to appear in the northern part of Xinjiang. Among them, there are heavy snow in the Altay, Tacheng area and along the Tianshan area in the northwestern part of Xinjiang, and there is heavy snow in the local area.
November 18 08 --20 08 pm precipitation forecast map northern region
Previously, snow or sleet weather occurred in northern Xinjiang and along the Tianshan area. From 08:00 to 18:00 on the 16th, snow or sleet weather occurred in the northern part of Xinjiang and along the Tianshan area. The precipitation in some areas was 10~16 mm. At 08:00 on the 18th, the depth of snow in northern Xinjiang was 2 to 9 cm, of which 28 cm for Jimu and 26 cm for Bayinbulak. "The superposition of the two snowfalls will bring a lot of trouble to the local road traffic. With the emergence of strong winds and cooling, people need to be more careful when traveling." Lin Jian introduced.
In addition, from the 20th to the 21st, there will be small to medium snow in the eastern and northeastern regions of Inner Mongolia. In the northeastern part of Inner Mongolia and parts of the northwestern part of Heilongjiang, there is heavy snow and local snowstorms. From the 20th to the 23rd, there were small to moderate rains (snow) in the eastern part of the Qinghai-Tibet Plateau, the eastern part of the southwestern part of China, the south of the Yangtze River, and most of southern China. From the 21st to the 22nd, there was heavy rain in parts of the south of the Yangtze River.
[Expert advice]
Lin Jian finally pointed out that gale, cooling, rain, snow and dusty weather will adversely affect facility agriculture, animal husbandry, transportation, and people's lives and health. Need to pay attention to the following aspects:
The first is to strengthen the prevention of adverse effects of wind and cold weather on agriculture and animal husbandry. Strengthen the management of facility agriculture, take measures such as wind-proof reinforcement and cold-proof and warmth to prevent the adverse effects of wind and rain and rain and snow; Xinjiang, Qinghai and other pastoral areas should be well protected against wind, cold and warmth. In addition, the Xinjiang Shankou area, the 30-mile and the Baili wind area and other places have large winds, and it is necessary to strengthen the prevention of strong wind hazards.
The second is to strengthen the prevention of adverse effects of rain and snow cooling weather on transportation. Rain and snow cooling weather will cause roads to freeze, and relevant departments need to do road snow removal, traffic safety monitoring and management, and emergency preparedness.
Finally, it is to strengthen the prevention of the adverse effects of dusty weather on the production and life of the people. Dust weather will adversely affect traffic, environment, agriculture and animal husbandry, and people's health and life. Local strong sandstorms will damage vegetation and threaten human and animal safety. It is recommended to take timely measures to prevent dust and sand weather hazards; users who use coal for heating should pay attention to the safety of fire to prevent gas poisoning.
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