Cold wave affects the formation of falling snow typhoon

Cold wave affects the formation of falling snow typhoon

Affected by the cold wave, snow typhoons are forming, which will affect the northeast region and lead to heavy snowstorms in many places. Cold wave weather has the characteristics of large influence range, fast moving speed of cold air and complex weather system. Snow typhoon caused by cold wave.

Affected by the cold wave, the snow typhoon1165438+1on the evening of October 20th, the cold wave began to move southward. According to the gust detection, the wind vane of magnitude 6 or above expanded rapidly from last night, covering the grassland in western Inner Mongolia and then spreading to Shanxi, Beijing, Tianjin and Hebei. From the early hours of the morning, windy areas above magnitude 8 also began to appear. In the howling cold wind, Beijing even has some dust.

Snow typhoon is coming.

In the afternoon 1 1, 2 1, a "snow typhoon" formed. The picture comes from the internet.

At present, the northeast cyclone can be said to be a "snow typhoon". This northeast cyclone was formed by the merger of Mongolian cyclone and Yellow Sea cyclone in Jilin and Heilongjiang.

After the northeast cyclone absorbs the power of the two cyclones, its central pressure will drop below 985 hectopascals, comparable to a strong tropical storm; And its wind field will spread all over the northeast, and the wind will not be inferior to that in North China today. More importantly, under its suction, a large number of warm and humid airflow will meet with the cold air in the northeast, and snowstorms will appear again.

It must be said that this is the second "snow typhoon" in Northeast China this year, and it is also the third national cold wave that China has encountered since June+10 in 5438.

This year's "snow typhoon" is easier than previous years.

The situation of snowstorm is very stable; The range is very large, and the whole northeast will be snowed, from Shenyang to Zhongxue, from Changchun to Heavy Snow, and from Harbin to Blizzard. It's very strong There will be a heavy snowstorm lasting for two days in Hegang-Jiamusi-Shuangyashan area in the center of the blizzard, and the total snowfall will be close to that of the previous Tongliao, which may be close to or break the local record 1 1.

How did the snow typhoon form?

As can be seen from the name of Snow Typhoon, its strong winds and heavy snow can be described as a "snowstorm" in one word, which has existed for a long time in China.

The appearance of this snow typhoon was also affected by the cold wave. 165438+1From October 20th, the cold wave from Siberia began to move southward in a large scale, accompanied by strong winds, which continued to expand. At present, there have been strong winds of magnitude 8 in some places.

When this cold air passes through Mongolia, it has already formed a cyclone. At this time, in the Yellow Sea, affected by the humid warm current, another cyclone was formed.

According to the path calculation of the two cyclones, they will eventually converge in the northeast to form a stronger cyclone, which is the reason for the formation of the "snow typhoon".

The place where this huge cyclone passes is mainly concentrated in the northeast, so the "snow typhoon" is also mainly concentrated in the northeast. When the light snow is in solar terms, there will be heavy snow. With the migration route of cyclone, it will eventually break through the block of warm current and reach some areas in the south, resulting in obvious cooling.

Affected by the cold wave, the snow typhoon formed 2165438+1on the evening of October 20th, and the cold wave began to move southward in a big way. Gust monitoring shows that the scale of wind power of magnitude 6 or above has expanded rapidly since last night, spreading over the grasslands in western Inner Mongolia and extending to Shanxi and Beijing-Tianjin-Hebei regions. From the early hours of the morning, windy areas above magnitude 8 also began to appear. In the howling cold wind, Beijing even has some dust.

165438+1October 2 1 Sunday afternoon, the gust distribution in North China and its vicinity came from NMC.

The wind force in the north is so strong that it is related to the formation of "snow typhoon" in addition to the strong cold wave itself. Since last night, the Mongolian cyclone began to develop and has reached Inner Mongolia today. This afternoon, under the attack of strong warm and humid airflow, the Yellow Sea cyclone has also been generated. These two cyclones will merge in Jilin and Heilongjiang to form a powerful northeast cyclone.

This northeast cyclone can be said to be a "snow typhoon". After absorbing the power of two cyclones, its central pressure will drop below 985 hectopascals, comparable to a strong tropical storm; And its wind field will spread all over the northeast, and the wind will not be inferior to that in North China today. More importantly, under its suction, a large number of warm and humid airflow will meet with the cold air in the northeast, and snowstorms will appear again.

165438+1northeast cyclone on October 23rd, produced by China Gas Love.

As we said before, the situation of this snowstorm is very stable; The range is very large, and the whole northeast will be snowed, from Shenyang to Zhongxue, from Changchun to Heavy Snow, and from Harbin to Blizzard. It's very strong There will be a heavy snowstorm lasting for two days in Hegang-Jiamusi-Shuangyashan area in the center of the blizzard, and the total snowfall will be close to that of the previous Tongliao, which may be close to or break the local record 1 1.

According to ECMWF, the snowfall near Jiamusi can be converted into a total of nearly 59 cm (not equal to snow) according to 1: 10.

This is the second "snow typhoon" in Northeast China this year, and it is also the third national cold wave since June+10 in 5438. According to the perennial data, the average number of cold waves in China from September to June is 1 and 9, which is more in early years and less than 1 and 5 since the new century. There is no doubt that before the arrival of winter in the climate sense, the cold wave in China has greatly exceeded the standard.

Why is this happening? In addition to the "typical La Nina" mentioned before, the SST distribution in the North Pacific has changed obviously this year, and the westerlies are prone to ups and downs. The thermal dome on the west coast of the United States, the southward polar vortex and the atmospheric river system can all explain the problem. In this context, the blocking of East Siberia and the warm ridge of the Sea of Okhotsk are prone to abnormal development, which makes it easier for the cold wave to go south to China and make it easier for the Northeast to "suppress" snow typhoons.

Obviously, "snow typhoon" is not the end of the cold wave. Under the acceleration of the snow typhoon, the cold wave will rush into the south in the early morning of June 22nd, 165438+, which will drastically cool Jiangsu, Zhejiang and Shanghai, and make a large area of southwest mountainous areas cool down and snow. Tomorrow morning, Jiangnan will be very uncomfortable. This "snow typhoon" is not the end of the snowstorm in Northeast China. Shortly after the cold wave, a circulation situation favorable to the development of snow typhoon appeared in the northeast at the end of 1 1. It may be very important to prevent snow and cold this winter.

Influenced by the cold wave, a snowfall typhoon formed. 1. Snow typhoon is forming! What is a snow typhoon?

165438+1On the evening of October 20th, according to the gust monitoring, the wind vane of magnitude 6 or above expanded rapidly from the night of 20th, covering the grassland in western Inner Mongolia and then spreading to Shanxi, Beijing, Tianjin and Hebei. From the early morning of 2 1, windy areas above magnitude 8 also began to appear. In fact, snow typhoons are accompanied by strong winds when it snows. Like the snow typhoon in this primary election, the maximum magnitude is more than 8, and the magnitude 8 typhoon can blow off the tender branches of trees, with great resistance. Therefore, everyone needs to pay attention to safety when traveling in a snowstorm typhoon of magnitude 8 or above.

2. What are the characteristics of this cold wave weather?

The cold wave has a large influence range, the cold air moves fast and the weather system is complex. In addition, coupled with the strong wind in the north (that is, the snow typhoon), the cyclone in Inner Mongolia began to develop at night on the 20th and reached Inner Mongolia during the day on 2 1 day. On the afternoon of 20th, under the attack of strong warm and humid airflow, the Yellow Sea cyclone was also generated. These two cyclones will merge in Jilin and Heilongjiang to form a powerful northeast cyclone.

1, cold wave weather characteristics 1: wide influence range.

The central and eastern parts of China, the eastern part of Huanghuai, Jianghuai and the central and eastern parts of the south of the Yangtze River have obviously cooled down, and the cooling range can reach 12 degrees. However, many places in Heilongjiang suffered from heavy snow, and there was a snowstorm in Xiang Xue on 2 1 night. Like Changsha in the south, it not only rained for several days, but also blew a strong wind at the weekend (that is,165438+1October 2 1), and the cooling rate was obvious. The highest temperature on Friday was 23 degrees, while the highest temperature on the 22nd was only 13 degrees.

2. The second characteristic of this cold wave weather: the cold air moves fast.

The cold wave moves faster. 2 1 In the morning, the cold front is still in the north of North China, and it will affect South China at night. In this process, the moving speed of cold air is faster than the last cold wave, which is closely related to the strong "thrust" of the middle and lower turning flow.

The characteristics of this cold wave weather: the weather system is complex.

For example, there are blizzards, big blizzards and even local blizzards in Northeast China. There is little to moderate rain in the southern region; There may be sand blowing or floating dust in northern North China. It can be said that the weather stage presents a pattern of "letting a hundred flowers blossom".

Characteristics of this cold wave weather: there are snowstorms in many places.

165438+1From October 20th, it was snowing all over the northeast, from Shenyang to Zhongxue, from Changchun to Heavy Snow, and from Harbin to Heavy Snow. Blizzard center is located in Hegang, Jiamusi and Shuangyashan. There will be two days of heavy snowstorms and heavy snowstorms, and the total snowfall will be close to that of Tongliao last time, which may be close to or break the local record 165438+ in early October.

Generally speaking, a snow typhoon is forming, which will affect the northeast region and lead to heavy snowstorms in many places. Cold wave weather has the characteristics of large influence range, fast moving speed of cold air and complex weather system.