At 23:59:09 Beijing time on December 21, the sun is directly 23°26'15.15'S (instant Tropic of Cancer), and the winter solstice is coming. This is a rather special day for Earth – a day when the direct solar spot reaches the southernmost position of the year and is about to begin moving northward, when the southern hemisphere reaches its maximum polar day, the Antarctic Circle is almost fully illuminated on the visible satellite cloud map, and the Polar Circle is at its maximum, almost completely submerged in darkness.
Of course, for our country, the weather pattern on the day of the winter solstice is somewhat different - at 12 noon Fengyun No. 4 high-definition visible light satellite cloud map, today most of the country's clouds open fog, the weather is clear, in this atmosphere, the winter solstice is actually warm and melting.
For example, on the temperature map at 13 o'clock on the hour, the afternoon temperature in many places in the eastern region of China today has risen to more than 15 degrees, and it has begun to approach 20 degrees, and the trance feels not like the winter solstice but like the spring equinox.
But it is easy to notice on the satellite cloud map that there is a large range of rainy clouds in the southern region of China today, which is the result of typhoon Rey's proximity, although at 8 o'clock this morning, the Central Meteorological Observatory announced that Typhoon Rey further weakened into a tropical depression in the northern part of the South China Sea at 08 o'clock this morning, and stopped numbering it, but Typhoon Rey undoubtedly brought rare winter solstice typhoons to many places in the south.
Although Typhoon Rey did not eventually land in South China, the scope of this Typhoon Storm is still quite broad, and unlike the warm and violent Typhoon Rain in summer and autumn, the December Typhoon brought by Rey is long and cold, in the rain, the minimum temperature in many places in Guangdong from 20 to 21 is generally only about 10 degrees, and the situation in Fujian is quite similar. For many places, this may be the most intense wet and cold weather since the second half of the year.
Warm places in addition to Guangdong Fujian, before the heating of the northeast of many places, today also began to turn cold again, 13 o'clock 24-hour temperature change map, many places 24-hour cooling amplitude of more than 10 degrees, which is the result of Siberia piled up cold source periphery touching the northeast.
And that could be a preview of the next stronger cold air — the Arctic vortex continues to hover around Siberia, piling up a large number of cold air masses, and as the Arctic vortex slowly moves south or even deeper into the northeast this week, it may induce a strong cold wave process. The Central Meteorological Observatory has clearly pointed out in today's medium-term weather forecast that from December 23 to December 25, there will be a cold wave affecting the central and eastern parts of China. At present, the warm melting of many places in the central and eastern parts of China may amplify the power of the cold tide, and the cooling brought by the cold wave when it goes south may be more ferocious.