China Weather Network News Recently, the weather in most of southern China has been relatively calm, with no significant precipitation and little fluctuation in temperature.
However, this calm is about to be broken. From today (April 22) until the end of this month, the south will encounter three consecutive rounds of heavy rainfall, accompanied by large-scale strong convective weather, local friends must improve Be vigilant.
Heavy rainfall + strong convection! Rain in the south will continue until the end of the month
According to Min Yuqiu, a meteorological analyst at China Weather Network, due to the strong warm and humid air flow and the active fluctuation of the southern branch trough, the precipitation in the south will show a significant increase in the future, and the state of more precipitation and more convective weather may continue until the end of this month.
It is expected that in the next ten days, the south will experience three rounds of rainfall on the 22nd, 24th-26th and 28th respectively. The cumulative rainfall in Jiangnan, central and northern South China and other places is 3-60% higher than the same period of the previous year, and the local area is too high. 1 times or more.
Today, the rain has spread in many places in the south.
From 8:00 to 14:00, significant rainfall occurred in northern Guangxi, Hunan, Jiangxi, southern Zhejiang and other places, and short-term heavy rainfall also occurred locally. For example, the precipitation in Longsheng in northern Guangxi reached 58.2 mm in 6 hours.
From the 24th to the 26th, the south will usher in a new round of rainfall with a wide range, strong intensity and strong convection.
There will be moderate to heavy rains in southern Huanghuai, Jianghuai, Jianghan, Jiangnan, northern South China, eastern Sichuan Basin, and central and eastern Guizhou. Among them, southwestern Henan, northern Hubei, southeastern Guizhou, northern Guangxi, southern Hunan, and central and southern Jiangxi There will be heavy rains in parts of , southern Zhejiang and other places, and heavy rains will occur locally in northern Guangxi, central Jiangxi, and southwestern Henan; there will be short-term heavy rainfall of 20-40 mm in some areas, with local areas exceeding 50 mm, accompanied by thunderstorms and strong winds , hail and other strong convective weather.
Specifically, on the 24th, there were moderate to heavy rains, local heavy rains, and strong rains in southern Shaanxi, central and southern Henan, Hubei, northern and western Hunan, eastern Chongqing, northern Guangxi, and northern Anhui, accompanied by obvious strong convective weather. Appear.
From the 25th to the 26th, the heavy rainfall area continued to develop eastward and southward, with heavy rainfall and strong convection in Jiangsu, Anhui, Hunan, Jiangxi, Zhejiang, Fujian, Guangdong, Guangxi and other places.
Min Yuqiu reminded that the formation of the southwest vortex moving eastward and the strong southwest jet stream created this round of large-scale heavy rainfall.
The southwest vortex was formed in the Sichuan Basin on the night of the 23rd, and then moved eastward in conjunction with the plateau trough, coupled with the infiltration of weak cold air in the lower layers, so that where the southwest vortex passed, a large number of warm and humid airflow converged to produce a fierce upward movement, which caused Heavy rainfall, strong convective weather such as thunderstorms, strong winds, and hail.
This round of precipitation may have two heavy rainfall zones in the north and south, one is located near the location of the Southwest Vortex, and the other is in the Southwest Jet Stream on the south side of the Southwest Vortex, and the proportion of convective precipitation is very high.
For my country, the Southwest Vortex can be said to be the second largest rainstorm weather system after typhoons. Many rare and severe flood disasters in history are closely related to the activities of the Southwest Vortex.
Therefore, the friends in the south should take relevant defensive measures in advance and must not take it lightly.
Fortunately, the southwest vortex moves faster this time, which means that the heavy rainfall will not stay in the same area for too long.
After the rain weakened briefly on the 27th, the third round of rainfall will follow around the 28th.
There will be moderate to heavy rain and local heavy rain in the eastern part of Southwest China, Jianghan, Jiangnan, and northern South China.
Three pictures tell you what to do when encountering strong convection
Although the midsummer season has not yet arrived, the strong convection cannot wait to "sense of presence" on the southern weather stage.
There are various types of strong convective weather, how to prevent it in a targeted manner?
When encountering lightning, you should stay away from the commanding heights, do not stand under trees to take shelter from the rain, do not use metal tools, turn off mobile phones and indoor power.
When encountering hail, enter the room as soon as possible or take shelter under a solid shelter, stay away from fragile objects such as windows and glass, and stay away from lighting circuits and transformers to avoid electric shock.
When encountering short-term heavy precipitation, pay attention to walking in stagnant water to prevent falling into manholes or potholes.
When driving, try to detour as much as possible when encountering stagnant water. If the vehicle stalls, the occupants in the vehicle should immediately get off the vehicle and wait for rescue at a high place.
When the water floods into the home, the power should be cut off immediately.