Is it normal for Beijing to fly snow in April?

On April 4 15, there was a sudden snowstorm in Beijing, and there was light snow or sleet from southwest to northeast in Beijing. At present, it is in the blue warning signal of continuous blizzard. Bian Xiao sorted out the information about snow in April in Beijing, and found that there was still a lot of snow in April in Beijing!

Since Beijing has meteorological records, "April Snow" has appeared 12 times, and the latest time was1April 4, 988. There is actually a lot of light snow in April in Beijing! From 1949, there were 13 snows in Beijing in April, which were 1956, 1957 (twice), 1958, 1959 and 60 respectively. But in the above-mentioned "April snow", there are a lot of sleet and ice particles, and the real "pure snow" is rare! Like the pure snow last night (2065438+April 4, 2008), it is the first time in 30 years, and it is really rare.

On the evening of April 4th, Beijing was covered with the echo of snow.

According to the truth, it is not easy for the temperature to soar in April, and it will snow in the plain. The snowfall in Beijing just happened to catch up with the key time node when the cold air has cooled down and the warm and humid air has briefly counterattacked, while the cold air has not yet arrived. It can be seen from the weather map on the evening of April 4 that there is a low pressure in the northwest and southwest of Beijing and a high pressure in the East China Sea. The situation of "two lows and one high" makes the humid air in the Bohai Sea and the Yellow Sea blow to the North China Plain on a large scale, and it happens to be aimed at the vicinity of Beijing. At the same time, 4.2 cold air has cooled Beijing in advance and cooled the ground, and 4.2 residual cold high pressure of cold air is still delivering cold air to Beijing. In this way, the conditions of water vapor and temperature are ready, and the snow near Beijing will naturally become 850 hectopascals on the evening of April 4. It can be seen that the water vapor in the East China Sea, the Yellow Sea and the Bohai Sea enters Beijing at a height of about 2000 meters and rises on the cold air to form snowfall.

Then, why doesn't it snow in Beijing all winter (in fact, it did once in mid-March) and it didn't snow until April? This may be related to the climate. Last year was La Nina. Generally, the next year, water vapor easily enters the north. On the other hand, there was too little snow in Beijing in the winter of 20 17-20 18, and this snow also meant compensation.

It is hard for many people to imagine that it was summer a few days ago and suddenly there was a blizzard, which was totally unacceptable. At present, precipitation has begun to appear in most parts of Beijing, or light rain or sleet. It turns snowy tonight, and the air pressure is high at night. It will snow at night and end tomorrow morning. It is difficult to snow in urban areas, and the snow in mountainous areas is obvious and will be very white.

However, asking this question does reflect a problem. It is difficult for Beijing to snow in April. The last pure snow in April happened on April 4, 1988, with a thickness of 0.5mm, not to mention the blizzard! So we really meet once every few decades. Let's take good care of it and go into the mountains to see the snow tomorrow.

In fact, it was a cold spring in previous years, but this year there was enough water vapor, so the emperor had a blizzard.

Come on, I'll explain to you what a cold spell is.

Late spring cold refers to the weather phenomenon that the temperature rises rapidly in early spring (generally refers to the end of February and the beginning of March), but the temperature in late spring cold (generally refers to April) is lower than normal.

The climate is changeable in early spring. If the cold air is strong, the temperature can drop to below 10℃, even in rainy and snowy weather.

Why is there a blizzard in late spring this year?

In previous years, when it was cold in spring, it was only cold, occasionally mixed with some rain and snow, but this year's snowstorm was mainly due to sufficient water vapor.

In vernacular Chinese, a few days ago, spring blossomed, the temperature rose, and the water vapor in the Bohai Sea and the Yellow Sea entered Beijing under the action of the south wind, which coincided with the cold air descending northward. The two men were in Beijing, and they were entangled. Then, it snowed.

Because there is a lot of water vapor in the north, it leads to blizzard.

Blizzard in Beijing in history;

1: There is heavy snow in Li Bai's Youzhou, and the Yanshan snowflake is as big as a seat, which blows down Xuanyuantai one by one.

2. < > In October of next year, the heavy snow will continue, and the city gate will gradually close, so that officials and people can't go in and out smoothly. The court ordered the loyalist to clear the snow inside and outside the capital, and both sides were clean.

3. "Ming History" contains: In the first month of the sixth year of Chongzhen, Xinhai, heavy snow, more than 20 feet deep.

4. "Tongzhouzhi" contains: It was winter, and it snowed five feet in Tongzhou.

5. < > In the eighteenth year of Qianlong (1753), there was snow in Jingxi, and branches scattered along the roadside. It was not sunny for five days, and the western hills were covered with snow curtains, which was not sunny for a long time.

Although the blizzard is good, it will bring some inconvenience to the lives of the people in the imperial city. If your friend in Beijing suddenly loses contact these days, don't worry, it may just be blocked by heavy snow!

Finally, please pay attention to safety and keep warm when traveling in Qingming!