Have you felt the recent change in temperature? Friends in the north may have already felt the heat of summer - on the morning of May 13, it can be seen from the high-definition visible satellite cloud map of Fengyun-4 that many places on the mainland from west to east are clear sky areas with few clouds, and in the clear sky area, the temperature continues to rise in many places.
1. Determination of high temperature in a wide range of northern regions
It can be seen from the 24-hour temperature change map that in a wide range of clear sky areas, the temperature rise in many places in the north is quite significant, the central and eastern parts of Inner Mongolia and the Northeast Plain have become the warming center, and the 24-hour temperature rise in many places exceeds 10 degrees.
On May 12, many parts of the northern part of the continent continued to warm up and ushered in a fairly dry weather pattern. For example, on the afternoon of May 12, the temperature of many stations in the North China Plain generally reached 27~28 degrees, and the maximum temperature was close to the 30 degree mark, and the relative humidity in many places in Beijing, Tianjin and Hebei was less than 20% when the temperature was close to 30 degrees, showing a dry and warm atmosphere outdoors.
Moreover, this kind of sunny and hot weather will continue for a period of time, the forecast of the Central Meteorological Observatory pointed out that in the next 10 days, there will be 5~8 days in the Xinjiang Basin with a daily maximum temperature of 35~38 degrees, and the local maximum temperature can reach 39~42 degrees. From the 17th to the 19th, there were 2~3 days of high temperature weather with a daily maximum temperature of 35~37 degrees in the central and western parts of Inner Mongolia, the central and southern parts of North China, Huanghuai and Guanzhong of Shaanxi. From the 17th to the 19th, moderate to severe dry and hot winds will occur in the central and southern parts of North China, Huanghuai and Guanzhong winter wheat areas of Shaanxi. So, what is causing the hot and dry heat in the north?
2. Authoritative forecast: continuous 40 up to 43 degrees
At present, the clear, dry and warming weather in many parts of the northern part of the continent is the result of being controlled by a large continental ridge of high pressure. What is a ridge of continental high pressure? To put it simply, it is a kind of high-altitude warm airflow, which will make the airflow sink and warm, the sky is clear and radiant, the air is dry, and the wind speed is relatively small, and the heat dissipation is slow, just like a "big pot lid" that does not dissipate heat, so the weather is mainly sunny and hot.
The supercomputer's forecast pointed out that in the coming period, warm ridges will continue to form in the westerly wind belt, and the strong continental high will continue to control many places in the northern part of the continent, and the temperature will continue to rise, and the degree of warmth will be further upgraded.
For example, in Zhengzhou, Henan Province, the official forecast shows that Zhengzhou will face a continuous high temperature of about 35 degrees from May 17, especially on May 17, and the temperature may reach a new high this year.
In the western region, it is the base camp of the hot and dry air mass, and the intensity of the hot and dry air mass has increased dramatically under the control of the high pressure on the mainland, and the high temperature and heat wave in some areas have become more violent. For example, in Turpan, the official forecast shows that Turpan will not only appear continuously at 40 degrees under the control of the continental high pressure, but can also reach up to 43 degrees.
3. The south continues to be cold!
High temperature will cause the human body to sweat more, water and electrolyte loss, easy to cause heat stroke, dehydration, low blood pressure and other symptoms, especially the elderly, children, and the infirm should pay attention to protection. Secondly, dryness will cause dry skin, eyes, respiratory tract and other mucous membranes, which can easily cause symptoms such as skin itching, eye discomfort, sore throat, cough, etc., so pay attention to replenishing water and moisturizing. Finally, sunny days can lead to strong ultraviolet rays, which can easily cause problems such as sunburn, tanning, and sunburn, so pay attention to sun protection and avoid prolonged sun exposure.
In contrast, the forecast of the Central Meteorological Observatory pointed out that it is expected that before the 17th, the precipitation in the south will be smaller and weaker; After that, precipitation will intensify in the south. From the 18th to the 20th, there will be a moderate to heavy rain process, with heavy rain in some areas, and locally heavy rain in the south of the Yangtze River and the north of South China. In this way, when the high temperature in the north intensifies, Jiangnan, South China and other places will once again enter a rainy period, and the temperature will be colder than in the north.
In short, with the combined effect of the high-altitude warm ridge and the continental high pressure, it will lead to the first large-scale high temperature in the northern part of the continent this year, and it will also lead to the widening of the temperature difference between the north and south of the mainland.