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Time:2021-6-5

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On July 18, Zhejiang announced “plum blossom” and bid farewell to the 50 day long rainy season in 2020.

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As the first “lucky man” to get rid of Meiyu in the postal area, he fell into the trap of high temperature before his state returned. On July 19, the highest temperature in most parts of Zhejiang exceeded 35 ℃,The temperature of Wencheng station in Wenzhou is as high as 38.6 ℃The Central Meteorological Observatory predicts that on July 21, China’s main rain belt will move northward,It is mainly located in the north of Sichuan basin to Huanghuai area.Does this mean that the “violent plum” in the South has come to an end?

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Mengtai rainfall big data

Before answering this question, let’s review the heavy rainfall data sheet for the past two months. From June 1 to July 19,The average rainfall in the Yangtze River Basin is 479.5mm, the highest since 1961; By region,Anhui, Hubei and Chongqing had the most rainfall in the same periodThe rainfall of Jiangsu, Zhejiang, Jiangxi and Guizhou was the second largest in the same period.

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From July 17 to 19, a new round of heavy rainfall gathered in the middle and upper reaches of the Huaihe River. The accumulated rainfall in some areas of Lu’an, Anhui Province, Hefei and Xinyang, Henan Province was 300-500 mm,Lu’an bureau is 642 mm. The daily rainfall of four national meteorological stations in Anhui Province, including Lu’an and Huoshan, broke through the extreme value since the establishment of the station. Affected by heavy rainfall, No.1 flood occurred in Huaihe River Basin; On the 20th, Wangjiaba hydrological station exceeded the guaranteed water level and discharged flood.

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Wangjiaba flood discharge

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On the 21st, the rain belt moved northward, and heavy rain came from Shandong and Henan

On the morning of the 20th, the blue rainstorm warning was lifted, marking that the current round of heavy rainfall has entered a weakening stage,However, the “violent plum” in the south does not intend to disappear21-23The main rain belt in China will move northward, mainly from the northern Sichuan basin to the Huanghuai river. The driving force behind the rain belt movement is still the subtropical high. With the extension of the subtropical high from west to north again,The rainwater positions were transferred to Sichuan Basin, southern Shaanxi, Henan, Shandong, Northern Jiangsu and Anhui

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During this period, the accumulated rainfall in some areas of northern Chongqing, Northeastern Sichuan, southern Shaanxi, Eastern Henan, central and southern Shandong, Northern Anhui and Northern Jiangsu was 100-200 mm, and the local rainfall was more than 200 mm; The maximum hourly rainfall is 20-50 mm, and the local rainfall is more than 60 mm.

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Mengtai weather report

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At present, although the rain in the middle and lower reaches of the Yangtze River has been suspended, Northern Jiangsu and Anhui and Northern Hubei are still under the curse of rainstorm. In particular, from the 24th to the 26th, the rain belt will be adjusted again. There will be heavy rain in Sichuan Basin, Southeast of Northwest China, Huanghuai River, Jianghuai River and the areas along the middle and lower reaches of the Yangtze River. I’m afraid that the “plum blossom” issue in Anhui, Jiangsu and other places will be delayed.

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The flood control situation is still grim, and the high temperature in South China is expanding

In the coming week, the situation of flood control is still grim. stayYangtze river basinUnder the influence of heavy rainfall in Sichuan and Chongqing,The upper reaches of the Yangtze River need to be alert to the formation of a new round of floodsAnd the pressure on the middle and lower reaches; stayHuaihe River BasinThe continuous rainstorm in Anhui a few days ago made the amount of water flowing into the middle and upper reaches of the Huaihe River rise rapidly, and there will be two more heavy rains this week,It further increases the risk of basin flood

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Mengtai science popularization time

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From the perspective of water system characteristics, the upper reaches of Huaihe River are easy to collect water due to poor terrain, the middle and lower reaches are gentle and difficult to discharge flood, and there are many tributaries on the north side. Once the regional continuous heavy rainfall is encountered, it is easy to cause serious waterlogging.

Meteorological experts remind:In the coming week, China’s main rain belt will change greatly,The main heavy rainfall areas are concentrated in Sichuan Basin, Southeast of Northwest China, Huang Huai, Jiang Huai and other places. Please pay close attention to the changes of local water, rain and flood situation and check the latest weather forecast and early warning information in time; Attention should be paid to the prevention of urban and rural waterlogging, mountain torrents and geological disasters caused by heavy rainfall.

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Pay attention to weather forecast information in time

Last but not least, the high temperature group will join several new members in the next two days, expanding its sphere of influence.
amongThe highest temperature can reach 37-39 ℃ in southern Zhejiang, Fujian, central and southern Jiangxi, southern Hunan, northeastern and southwestern Guangdong, and Turpan Basin, XinjiangThe local temperature is above 40 ℃. We must do a good job in heatstroke prevention measures!

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The weather has my technology for you

Central Meteorological Station “Ai weather” small program released

Welcome to try

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Science and technology innovation service of Central Meteorological Observatory

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