Do you know what cold spring means? What month does the cold spring usually occur?

Do you know what cold spring means? What month does the cold spring usually occur?

At noon on March 14, from the cloud image of Fengyun-4 high-definition visible light satellite, a large-scale rain cloud in the east of China is particularly conspicuous today. It is a rain and snow cloud system formed by the entanglement of cold air and warm and humid airflow penetrating south. In Anhui, Jiangsu and other places in the east of China, thunderstorms occurred in some areas affected by it this morning.

First, the cold air in central and eastern China is strengthening.

To tell you the truth, the influence of this cold air infiltrated from the south on the south of the Yellow River is quite weak-from the 24-hour temperature change chart at noon 12, today, only Hubei, Anhui, Jiangsu and other places under the control of the rain belt south of the Great Wall have the most significant cooling, while the cooling in other areas is not obvious. Even so, with the alternation of winter and spring in March, cold air began to stir. At present, the intensity of the new round of cold air is not bad, at least as hard as warm air, not as weak as the cold air these two days. The actual range of thunderstorm weather forecast in the central and eastern regions is narrower than expected, and even under the pressure of weak cold air, the temperature in some parts of the south has reached a new high. Supercomputer predicts that this week's westerly belt fluctuation will transport cold air to the south in the central and eastern regions of China, and then the 850 HPA freezing line will push to the south of the Great Wall again.

Second, the cold and warm air is about to clash fiercely.

Recently, the warm air in central and eastern China is strong, and many places are warmer. In the south where there is strong cold air, there will be fierce conflicts between cold and warm air with the same intensity-it may cause large-scale convection activities in the central and eastern regions of China, accompanied by repeated rainfall and cooling. For example, in Wuhan, Hubei Province, the official forecast has pointed out that the minimum temperature in Wuhan will drop below 5 degrees over the weekend, which may be the coldest moment in the near future.

The third is the judgment of large-scale cooling and precipitation situation.

The Central Meteorological Observatory called this week's cold and warm air mass with rain and snow a large-scale precipitation and cooling process. According to the forecast of the Central Meteorological Observatory, there will be a large-scale precipitation and cooling process in the central and eastern regions from 3 16 to 17, with moderate to heavy rain and local heavy rain in Henan, Shandong, Hubei, most of Hunan, Anhui, Jiangsu, northwestern Jiangxi, Zhejiang and eastern Guizhou. There are small to medium snow (rain) or sleet in Gansu, Shaanxi, Shanxi, Inner Mongolia, Beijing-Tianjin-Hebei and other places; There will be a temperature drop of 4 ~ 8 degrees in most parts of the central and eastern regions, and the local temperature drop in Henan and Anhui can exceed 10 degrees.

Judging from this forecast, when a large range of rain and snow strikes, the cooling rate in Henan, Anhui and other provinces can reach the level of Zhengzhou, Henan Province like a cold wave. At present, the official forecast has pointed out that the lowest temperature in Zhengzhou will drop directly from 10 degrees to about 0 degrees this week, while the highest temperature will drop directly from 25 degrees to about 5 degrees, which is quite intense. The cooling range like Zhengzhou does not rule out the need to issue a cold wave warning. Of course, during this large-scale precipitation cooling process, many northern provinces may issue cold wave warnings. After the early warm wave, this cold air may indeed bring the feeling of "cold in late spring".

In which month does the late spring chill usually occur?

Spring cold generally occurs from the beginning of March to the end of April, and the time span is two months. It is mainly due to long-term rainy weather or frequent invasion of cold air, or strong radiation cooling in sunny nights under the control of cold anticyclone.

If the average temperature in late spring is more than 2℃ lower than normal, it is considered as cold weather in late spring, which can cause harm to agricultural production, especially the temperature in late spring is higher than normal and lower than normal.

What do you mean by cold spring?

Spring cold refers to the weather phenomenon that the temperature rises rapidly in early spring (generally refers to March in the northern hemisphere) and the temperature is lower than normal in late spring (generally refers to April or May). It is mainly due to long-term rainy weather or frequent invasion of cold air, or strong radiation cooling in sunny nights under the control of cold anticyclone. If the average temperature in late spring is more than 2℃ lower than normal, it is considered as cold weather in late spring, which can cause harm to agricultural production, especially the temperature in late spring is higher than normal and lower than normal. To put it simply, the weather gets warmer in spring, and the temperature drops obviously due to the invasion of cold air, thus causing harm to crops. This kind of "warm before spring and cold after spring" weather is called cold at the end of spring.

How long does a cold usually last in late spring?

A cold in spring usually lasts for 3-5 days, but sometimes it lasts for 2 weeks. Due to the frequent attacks of strong cold air, the temperature dropped rapidly. Spring cold refers to the weather phenomenon that the temperature rises rapidly in early spring (usually in March) and the temperature is lower than normal in late spring (usually in April or May). This kind of weather with warm spring before and cold spring after is called cold spring. The climate in early spring is changeable. If the cold air is strong, the temperature can drop below 10℃.