Recently, the weather in many parts of the northern hemisphere is not calm, and Afghanistan in central Asia has recently encountered a fierce weather attack - the Pamir Plateau has fallen to heavy snowfall, and there are heavy to heavy rains in areas at slightly lower altitudes. In order to rescue the trapped people, the local helicopter has been urgently dispatched to rescue, and many people have been forced to relocate.
Among them, Kandahar, Afghanistan's second largest city, was the center of the rainfall, which suffered a severe drought in the second half of last year, and the local government once held a "rain prayer ceremony", but now it has directly turned into a flood under the heavy rain, and there has been a rather violent drought and flood turn. On January 4, widespread rain and snow continued in Afghanistan.
Afghanistan is landlocked, most of the country is dry, and the supply of fresh water is limited. Taking Kabul, the capital of Afghanistan, as an example, Kabul belongs to the semi-arid climate type, precipitation is mainly concentrated in winter (snowfall) and spring, the annual rainfall is only about 300 mm, the annual rainfall in Beijing, which belongs to the temperate monsoon zone, is 600 mm, and the annual rainfall in Kabul is only half of Beijing. As a result, heavy rainstorms and blizzards are relatively rare in Afghanistan.
From the current point of view, the culprit that caused the heavy rain and snow in Afghanistan is the violent fluctuations in the upstream westerly wind belt. At the initial supercomputer field at 8 a.m. Beijing time on January 4, the weather situation in Eurasia today is actually still choppy - in the north of Kazakhstan, a strong low vortex has emerged, and a long deep trough has been pulled out on the south side, stretching from Kazakhstan to the Persian Gulf, and Afghanistan is located in front of this deep trough, and the air flow in front of the trough induces water vapor in the Arabian Sea to the north, eventually creating strong rain and snow in many parts of Afghanistan.
From the current point of view, this violent fluctuation in the eurasian westerly wind belt also shows signs of eastward transmission along the westerly wind belt, which may become the prototype of the southern branch. In the forecast of the Central Meteorological Observatory, it is pointed out that the snowfall in Xinjiang, Tibet and other places in western China will increase and increase.
Will it be a precursor to the wet and cold in the central and eastern part of our country? The supercomputer's prediction believes that there are indeed signs of inducing the eastward shift of the south branch in the later stage, which may lead to an increase in rain and snow in the central and eastern parts of China, becoming a sign of wet and cold in late January. Of course, the forecast is still variable and needs to be continuously observed.