It is preliminarily determined that strong cold air will bring about a wide range of severe cooling.

It is preliminarily determined that strong cold air will bring about a wide range of severe cooling.

It is preliminarily estimated that strong cold air will bring about a wide range of severe cooling. In addition to cooling, there are also rainfall processes and rain and snow. The temperature in North China, Huanghuai, Jianghuai, Jiangnan and other places has dropped by 6 ~ 8℃. It is preliminarily estimated that strong cold air will bring about a wide range of severe cooling.

On the afternoon of April 7, a netizen in Haicheng, Liaoning Province noticed that although the sunshine in the blue sky was still dazzling, the sun looked a little different from usual-a faint white halo was linking the sun, forming a rather strange scene, just like a huge "diamond ring" in the sky. A halo is a ring, and the sun is a diamond on the ring.

At the same time, many netizens also want to ask: What strange phenomenon is this? Is it a sign of a cold wave? Could this be a precursor to an earthquake? This is actually a quite typical "magic solar ring" phenomenon. The magic sun ring is a special atmospheric optical phenomenon, belonging to a kind of ice halo, which is refracted by cirrus clouds, cirrostratus and other high-cloud ice crystals. Simply put, the more familiar solar halo is a kind of "relative".

Phantom solar ring observed in gifu county, Japan in April 20 19.

The magical solar ring is formed by the reflection of hexagonal ice crystals almost perpendicular to sunlight. Reflection can be external (that is, it does not pass through ice crystals), forming an illusion ring near the sun; It can also be internal (one or more reflections in the crystal), forming a magical solar ring far away from the sun. Because multiple reflections will make refraction asymmetric, some colors will be separated in the part far away from the sun.

When the sun is low, it is like an elegant white training. When it is high, it is like a diamond ring hanging in the sky with a shining sky. Many ancient records of "Bai Hong's passing through the sun" are probably the magical solar ring phenomenon.

Phantom rings and phenomena observed at Toyama Observatory in Japan in May 2008.

For Liaoning, this is also a quite classic magical solar ring phenomenon. At the same time, several obvious white spots can be noticed on the other side of the magic sun ring, which is actually a magic sun of 120 degrees, which is the product of high-altitude ice crystals refracting sunlight on April 7.

Judging from the satellite cloud picture of that day, most areas over the northeast were mainly sunny, which was actually affected by the last wave of northeast cold vortex. Under the influence of the remnants of the northeast cold vortex, the temperature in some parts of the northeast is low, and there are ice crystals, which can finally refract sunlight to form a spectacular magic day.

Of course, the residual influence of the northeast cold vortex also means that the westerly belt is actually very unstable in the near future, and the next wave of westerly belt fluctuations is already ready to go-the supercomputer's forecast points out that from April 10, the westerly belt trough will once again provoke large-scale infiltration of cold air into China.

According to the current forecast of the Central Meteorological Observatory, there will be a large-scale obvious cooling and precipitation process in Xinjiang and most parts of the central and eastern regions due to the influence of strong cold air on June 5438+00- 14. The temperature in the eastern part of northwest China, North China, Northeast China, Huanghuai, Jianghuai, Jiangnan and other places dropped by 6 ~ 8 degrees, and the local temperature was above 12 degrees. Therefore, after the recent warming tide, everyone should also be careful of the sudden attack of cold air!

The tentative strong cold air will bring about a wide range of severe cooling. Has the typhoon active period come in April? Indeed, the typhoon "Marka" in 2022 1 has been generated, and the appearance of this typhoon is actually not unexpected, as we have already said.

According to the forecast of China Climate Center, this typhoon will continue to move to the northwest, and its intensity will gradually increase. However, the China Climate Center temporarily gave this typhoon embryo a peak value of 14, which is expected to arrive in April 12. The United States Joint Early Warning Center temporarily gave 100kt, which is equivalent to 50m/s, so the intensity forecast should be greater.

However, this typhoon is still developing near the Philippine offshore, and according to the current trend, it is unlikely to affect China. It depends on whether there will be a "chain effect" in the follow-up, mainly because there are still two typhoon embryos continuing to develop. The codes are 94W and 96W respectively. According to the forecast, at least one of these two typhoon embryos may become the second typhoon "Catfish" this year.

Did the "double typhoon" come in April? According to GFS, typhoon embryo 94W is still developing, with central wind speed 15KT and central air pressure 1005hpa.

However, although GFS predicts that there may still be air pressure value below 1000hpa in 94W, it can be named according to the air pressure value. However, with the continuous development of Typhoon Marka (1) this year, it is expected to be "swallowed up" soon.

This means that it is unlikely that 94W will be named separately. The European Numerical Center (EC) is not optimistic about this typhoon embryo for the time being. What everyone is most concerned about is the 96W South China Sea typhoon embryo, which may become the second typhoon "Catfish" this year. The wind speed of typhoon embryo is temporarily 15KT, and the central pressure value is 1007hpa. But it may increase rapidly afterwards.

GFS is expected to develop 998hpa in April 1 1, and then continue to strengthen. It is expected that 14 will reach 988hpa in April. Therefore, according to this intensity, it is very likely to become the second typhoon "Catfish" this year. Typhoon embryos are not expected to approach South China, but move northward, and are expected to disappear after landing in the Philippines.

According to the "airflow dynamics", it is expected to be "towed away" by the embryos of 1 typhoon Marka and typhoon 94W. Therefore, 96W typhoon embryos are expected to move northward synchronously.

So it is possible that two typhoon embryos and typhoon Marka (1) formed a "chain effect". Of course, we can only continue to observe how the follow-up changes. Judging from the trend, there may indeed be a "double typhoon" in April, so everyone should be prepared.

However, with the continuous development of typhoons, we should pay attention to the development of cold air. The cold air in northern China is also highly active, and the intensity of a new round of cold air looks not low.

When will a new round of cold air come? Since April, the temperature in China has shown a "polarization" pattern as a whole. The temperature in the north is mainly "warm", and in some areas it is still higher than 6 degrees, while the temperature in the south is mainly cold. Yunnan, Guangxi, Sichuan and other large areas are also 2 degrees to 4 degrees lower, and Guangdong, Fujian, Guangxi and other places are also low 1 degree to about 2 degrees.

So it is "warm in the north and cold in the south". Of course, what needs attention here is "comparison of data periods in the same period".

Judging from the supercomputing, in fact, this cold wave has already formed, and is gradually approaching China and Inner Mongolia. It is expected that it will quickly enter Northeast China and North China on April 10. At this time, the northeast vortex appears again, which may accelerate the decline of cold air.

At the same time, this wave of cold air is expected to enter southern China. Cold air, like an arrow, goes straight into South China from the north, showing a pattern of "45 degrees".

Among them, Hunan, Guizhou and Guangxi may be affected by cold air. So this wave of large-scale cooling has come. At the same time, it is expected that after this wave, there will be another wave of cold air that may affect the south, and the coverage may be wider. Come and see it later. It is not ruled out that it may trigger a regional "cold spring" model. Everyone should be prepared for the arrival of cold air.

How strong is this cold wave? Whether in the south or the north, it will have a cooling effect. Let's give an example to illustrate how strong the temperature drop is.

First of all, we should know that with the increase of temperature, high temperature has entered the northern part of China, and the area above 30℃ is still expanding northward. According to the mesoscopic weather, the highest temperature in parts of northwest and north China will approach or exceed 25℃ in the next three days, and it will be around 27℃ in the middle and lower reaches of the Yangtze River.

Among the provincial-level cities, Jinan, Zhengzhou, Changsha and other places can approach 35℃, and will experience early summer, so the' 30℃ high temperature' in the north will generally hit.

For example, in Zhengzhou, Henan Province, it is estimated that the maximum temperature in April 1 1 day will reach 34.5 degrees. However, with the strong attack of cold air, it is expected that the maximum temperature will drop to 17.3 degrees on April 2, directly dropping by nearly 18 degrees.

In Jinan, Shandong Province, in April 1 1, the highest temperature was 3 1 degree. After April 12, the highest temperature was only 16 degree, and it was necessary to enter a cliff-like cooling, with a big drop of only 15 degree, which was comparable to the "cold wave level".

In the south, because the cold air comes slowly, the temperature should drop a little. For example, in Changsha, Hunan, the highest temperature was 365,438+0 degrees at 65,438+08 degrees in April, while it was only 65,438+08 degrees at 65,438+04 in April, so the temperature should be directly lowered by 65,438+03 degrees, which is not low. This is what we are talking about.

Of course, the China Climate Center also clearly stated that on April10-April 14, Xinjiang and most of the central and eastern regions will experience a large-scale obvious cooling and precipitation process due to the influence of strong cold air. Among them, the temperature in North China, Huanghuai, Jianghuai, Jiangnan and other places dropped by 6 ~ 8℃, and the local temperature was above 12℃.

Therefore, a large-scale cooling is coming, which can be confirmed. In addition to cooling down, there is also a rain process, and there is also rain and snow. Among them, there are small to moderate rains (snow) or sleet in eastern Inner Mongolia, southern North China, Northeast China and Huanghuai.

There are small to moderate rains, local heavy rains or heavy rains from west to east in the eastern part of Southwest China, Jianghan, Jiangnan and South China. So the rainfall is relatively strong. Everybody get ready. With the continuous development of cold and warm air flow, there may even be a chain effect of climate. Pay attention to strong weather such as strong winds, and we will pay more attention to it later.

The preliminary reservation of strong cold air will bring about a wide range of severe cooling. On April 8th, with the continuous fine weather and bright sunshine in April, the large-scale warming wave in China continued-April 8th morning 10. According to the 24-hour temperature change chart, the temperature in most parts of China continues to rise today, especially in Huanghuai, North China, Northeast China and other places, such as Jilin, where the 24-hour warming range of individual stations exceeds.

First, after a substantial increase in temperature, there is a significant cooling trend.

For many places in North China, the coming weekend may be the hottest weekend in the near future-under the continuous control of a large number of dry and hot air masses, the heat in Huanghuai and other places in North China will further rise. It has been pointed out in the forecast of the Central Meteorological Observatory that around April 10, a large red area of 32-35 degrees will appear in the eastern part of northwest China, north China and Huanghuai, even hotter than the southwest and south China in the south!

For example, in Zhengzhou, Henan Province, the official forecast shows that Zhengzhou will rise to above 30 degrees from today, and it will continue to be dry at high temperature from April 9 to April 1 1, and the highest temperature in April 1 1 day may be close to 35 degrees, which does not rule out becoming the first northern capital city with high temperature this year.

However, it can also be noticed in the forecast that from April 1 1 to April 12, the highest temperature in Zhengzhou will drop directly from 34 degrees to 17 degrees, with a decrease of nearly 20 degrees before and after, and the lowest temperature will drop directly from 20 degrees to below 10 degrees. This temperature change will directly return to spring from the feeling of early summer.

Second, strong cold air is about to break out.

In addition to Henan, the forecasts of many cities have also undergone similar changes. For example, Taiyuan, Shanxi Province will directly return from the highest temperature of 32 degrees in April 10 to the highest temperature of 14 degrees in April 14, and the lowest temperature will approach the 0-degree line again, which is called cold wave level cooling.

The chief culprit of severe cooling in many places is the large-scale invasion of cold air in China on April 10. Supercomputer forecast indicates that this cold air will accumulate strength in Mongolia from April 9th, and then it will invade northern China on a large scale. By April 12, the northerly wind whistling at 850 hectopascals will reach the south of the Yangtze River, which means that cold air will go south to the hinterland of central and eastern China.

On April 12, Chinese meteorologists made 500 hPa geopotential height map and 850 hPa wind field situation map according to ECMWF.

Third, the Central Meteorological Observatory tentatively set strong cold air.

At present, the Central Meteorological Observatory has also noticed this cold air, which is currently recognized as strong cold air. According to the forecast of the Central Meteorological Observatory, on April 10- 14, affected by strong cold air, there will be a large-scale obvious cooling and precipitation process in Xinjiang and most parts of the central and eastern regions. The temperature in the eastern part of northwest China, North China, Northeast China, Huanghuai, Jianghuai, Jiangnan and other places dropped by 6 ~ 8 degrees, and the local temperature was above 12 degrees;

There are 4 ~ 6 winds in most areas north of the Yangtze River, and dusty weather in the eastern part of northwest China, central and western Inner Mongolia and northern North China. There are small to moderate rains (snow) or sleet in eastern Inner Mongolia, southern North China, Northeast China, Huanghuai and other places; There are small to moderate rains, local heavy rains or heavy rains from west to east in the eastern part of Southwest China, Jianghan, Jiangnan and South China. In this way, after this week's high temperature, the weather next week will become quite fierce.