The biggest range of rain and snow since 2022 is coming! Is it hard to warm winter again? Indeed, this large-scale rain and snow distribution will affect more than 25 provinces, not many. Cold, wet and cold and other climatic phenomena have also appeared, so that many people may feel cold. At the same time, the emergence of this round of large-scale rain and snow has also led to a new round of climate change.
Although it does not reach the level of "cold wave", which causes a wide range of rain and snow, the superimposed cold air or cold air flow continues to enter. "Winter cold" must also exist. Then this large area of rain and snow appears, is the warm winter variable again?
Here we need to explain two issues to illustrate the problem of cold and warm, one is from the perspective of climate patterns since this winter, and the other is the impact of La Niña.
Of course, when it comes to the development of the La Niña phenomenon here, when the Tonga volcano erupted on a large scale, the medium weather pointed out that the Tonga volcano may affect the development of La Niña, but from the current trend, the main Nino 3.4 index, not only did not weaken, but strengthened.
So it doesn't seem to have an impact? The index zone of a single Nino 3.4 doesn't seem to have much impact, so it depends on whether this is a short-lived fluctuation or a sustained enhancement.
However, from the situation of the index, we can also see that in fact, the overall Nino 3.4 monitoring situation has changed dramatically, and has developed from the range of -1 degrees to -1.5 degrees to -0.5 degrees to -1 degrees. This means that the peak of the La Niña phenomenon may have passed and is weakening.
If combined with the first 2022 trend on La Niña released by NOAA, it is even more indicative that the original La Niña phenomenon may have reached its peak. But it hasn't gone away yet, and it's expected to affect at least the entire winter period. Therefore, the impact of la Niña phenomenon continues to develop.
With the development of the Naranina phenomenon, the cold air on the continent may be much more active. The fact is that cold air has indeed been active since this winter, but many people may feel that the active cold air in the north has not produced a large-scale cooling, is this not the case?
Indeed, that is the second issue we are going to talk about, the climate pattern since this winter. Judging from the temperature since this winter calculated by the National Climate Center, the mainland is indeed warm in a large range, and there have been temperature changes from 2 degrees to 4 degrees in North China, central Inner Mongolia and other places, while only heilongjiang, Tibet and other parts of the region have appeared cold, and the local cold can be seen about 4 degrees.
So, the whole is warm, what does this mean? Although La Niña triggered the activity of cold air, it was not strong, and as a result, a large area of the continent was still warmer. However, this year's cold festival continental climate is relatively in line with the standard of "cold", and many areas also feel the taste of "cold", so it is good.
Therefore, from the above situation, the possibility of a warm winter is greater. At least from the available data, it is still likely to be warm. Then there is no possibility of change? In fact, the trend is warm, there may still be room for change, because the winter is not over, before the end of February, if there is a continuous large-scale cooling, it is possible to reverse the existing warm trend, it may turn into a cold winter, warm winter is difficult, so the warm winter trend still has variables.
No, the maximum range of rain and snow in 2022 is coming, and the impact on the climate is bound to exist. Therefore, the change space of this winter's cold winter and warm winter still exists, which is the general situation. Let's also take a look at the biggest range of rain and snow this year. This year, the largest range of rain and snow has been very extensive, and the impact has exceeded 25 provinces (mentioned above), but this wave of snowfall is a "gradual" state, not all of which are directly falling.
Moreover, a large area of the central and eastern parts of the continent has been covered by "clouds", which is the "phenomenon embodiment" of large-scale rain and snow. Judging from the "dividing line" of rain and snow, the overall snowfall is still mainly north of the Yangtze River, while the south of the Yangtze River is mainly rainy.
On January 20, central Inner Mongolia, Shaanxi, Shaanxi, Henan, Hebei, Beijing and other places were already covered by snowfall. For example, the first snow in Beijing in 2022 also fell. At this time, only the rainfall in Chongqing is relatively strong, and there is heavy rain in the local area.
By January 21 and 22, the snowfall in the north will continue to move east and south, so the "pure snow" is going south. The "pure snow" range extends a lot to Hubei and other places, and at this time the rainfall in the south expands in Hunan, Guangxi and other places. Around the 23rd, the snowfall will continue to move east, while the rainfall in the south will also escalate, and there will be local heavy rain.
So on the whole, this round of snowfall is mainly concentrated in the north, the rainfall is concentrated in the southern region, in Shaanxi and Henan and other places there is heavy snow, local blizzard situation is more obvious, but it is not that there is no south, there is snow in the south, but the scope is not large, the climate center has been forecast, there is a trend.
After this wave, according to the climate center, there is another wave of large-scale rain and snow, which is expected to be on the 25th and 28th (that is, next week), although after the first wave, there is a "phased" change in the rain and snow on the 24th, but on the whole, it has not completely disappeared, which is equivalent to a "continuous" snowfall climate, and the "snow" in the second wave of rain and snow may be more southward.
For example, around January 26, there was a small area of rain and snow in Guizhou, Hunan and other places, so the snowfall in the south may increase, which is the general situation. On the whole, there are still many snowfall areas in these two rounds, and the climate center has also been explained.
However, the distribution of "pure snow" in the north is more, and the snowfall in the south is still less, even if there is snowfall, it is also the most "sleet", depending on whether further changes will occur in the follow-up. The overall snowfall also moves from west to east. Finally, I would like to remind everyone that it is now during the Spring Festival, and travel should pay attention to safety.