Starting today (September 24), the weather this week will enter a period of calm. In the north, there will be neither much nor strong precipitation in the next three days; in the south, the temperature will mostly rise, and the range above 30°C will increase significantly. Although the muggy feeling has rebounded, it will not be as unbearable as the previous scorching heat.
However, starting from the 27th, a long-brewing strong cold air will break the calm, bringing "combination weather" such as rain, snow, strong winds, and strong cooling. In addition, this strong cold air may also be the "terminator" of this year's high temperature weather in the south, while some areas in the north may "step into winter."
Strong cold air: strong wind to cool down, I am not covering it!
Let’s first focus on the cooling ability of this strong cold air. Since September, the cold air affecting our country has generally been weak, and the temperature in most areas has been significantly higher than the same period of the year. Especially in eastern Sichuan and most areas of Chongqing, the temperature has been above 6°C.
After the impact of this round of strong cold air, the current high temperature situation in our country will be completely reversed. It is expected that the temperature will generally drop by 4 to 8°C in the northern region, and by 10 to 12°C in the northwest, Inner Mongolia, and parts of the northeast, with local temperatures exceeding 14°C.
Not only does the temperature drop greatly, the cold air also affects a wide range. The cold air will be the first to affect Xinjiang and other places around the 27th; the impact in most of the central and eastern regions will be basically between September 29 and October 2; the temperature impact in the southern region will lag slightly behind, and the magnitude will not be as great as that in the north. It is expected that during the National Day holiday There will be a significant cooling initially.
After the cooling, temperatures across the country will hit new lows since the beginning of autumn in a large area. From the 28th to the 30th, the maximum temperature line of 20°C will move all the way east and south, with the highest temperatures in most of the northwest, western and northern North China, most of the northeast, and eastern Sichuan. It will drop below 20℃, with the lowest temperature generally only in single digits. There may even be the first frost in Qinghai and Gansu, which is earlier than the same period of the year.
In the city, the highest temperature in Xining was still around 24°C on the 27th, and fell below 10°C on the 29th. The lowest temperature in the morning from the 30th to the 31st was close to freezing point, as if "stepping into winter" in two days. Chongqing, which is prone to high temperatures this year, will return to high temperatures for three consecutive days from the 27th to the 29th. The highest temperature will drop to about 27°C on the 30th, which may bid farewell to this year's high temperature season.
In addition, as the cold air advances, winds of magnitude 4 to 6 will blow in many places, with gusts of magnitude 7 to 8. There will even be rare strong winds from Shaanxi, Gansu, Ningxia to the Sichuan Basin. Moreover, the wind chill effect will also amplify the feeling of cold, reminding everyone to pay attention to wind protection and warmth.
Strong cold air: I am a walking rain and snow maker!
In addition to strong winds and cooling, this strong cold air will also bring widespread rain and snow to the central and eastern regions. The precipitation process will cover most of the country from west to east, with the main precipitation period from the 28th to the 30th. There will be moderate to heavy rains and local heavy rains in the eastern part of Southwest China, the eastern part of Northwest China, North China, Huanghuai and other areas.
For places such as northwest and north China, this precipitation does not have obvious convective energy. It is mainly frontal stability precipitation. However, the precipitation lasts for a long time and the cumulative amount is large. The overall amount may reach heavy rain to heavy rain. This may also be This is the last heavy rain in North China, Northwest China and other places this year.
In some higher-altitude areas such as Gansu, Qinghai, and Ningxia, rain may turn to snow around the 30th, and there may even be localized blizzards.
This round of strong air is already gearing up and eager to try, but the current forecast timeliness is far away. The specific rain and snow transition time, precipitation intensity, falling area and strong wind conditions require the public to pay attention to the nowcasting. No matter what, I still suggest that you seize the opportunity to dig out your autumn and winter equipment during these few days when the cold air has not arrived, and don’t be caught off guard by it!
