Xinmin Evening News (Reporter Ma Dan) It has been raining lazily in Shanghai these days. This morning, due to the eastward movement of the shortwave trough, there was brief rain in Shanghai. However, the sun showed its face in the afternoon, the summer wind also blew away the clouds, and the "feeling of plum rain" also dissipated. However, there are not many quasi-Huangmei days left that are "like plums but not plums". The Shanghai Central Meteorological Observatory predicts that Shanghai will officially enter the rainy season on the 19th (the rainy season falls on June 19 all year round, and June 17 last year). Tomorrow may be the clearest day in the future.
html Starting from the 19th, the Meiyu belt gradually moves north from the Jiangnan area and stabilizes in the middle and lower reaches of the Yangtze River. The middle and lower reaches of the Yangtze River Delta, including Shanghai, will enter a period of heavy rainfall concentration. Meteorological experts said that although the rain belts will still swing north and south during the rainy season, the rainy season requires serious "career". Not only that, this year's plum rains are also "menacing".According to the forecast, Shanghai will encounter a "plum rainstorm" on the day of the plum blossom season on the 19th. It is expected that there will be heavy rain to heavy rain from the 19th to the 20th, accompanied by thunder and lightning, short-term heavy precipitation and thunderstorms and strong winds. The main precipitation period It will appear during the day on the 19th and the 20th. The cumulative rainfall can reach 40 to 60 mm, and it will reach 80 to 100 mm in some areas. The maximum hourly rainfall intensity is 30 to 50 mm. From the 21st to the 26th, the rain belt will remain in the middle and lower reaches of the Yangtze River, and heavy rains will occur frequently in Shanghai.
However, after the plum season, the temperature in this city will not fluctuate much. The extreme maximum temperature is expected to be around 30℃, and the minimum temperature will remain between 25 and 26℃.
Meiyu usually refers to the climate phenomenon of continuous rain in the Jianghuai River Basin in June and July every year. Since this is the ripening period of Jiangnan plums, it is named "Meiyu". The National Climate Center will conduct real-time monitoring of plum rain in three regions including Jiangnan District, the middle and lower reaches of the Yangtze River, and Jianghuai District based on the "Meiyu Monitoring Indicators". Shanghai is located in the middle and lower reaches of the Yangtze River, and its annual average plum blossom time is June 19 (based on Xujiahui Station from 1991 to 2020). Because in the plum rainy season, the temperature and humidity are high, and items are prone to mold. Therefore, the plum rainy season is also called "yellow plum day" and plum rain is called "mildew rain." Meteorological data statistics show that the plum rainy season brings about 1.66 cubic kilometers of precipitation to Shanghai every year on average. The plum rainy season in 1954 was the longest in history, lasting 58 days. However, there are also many years where there are no more than 4 days of rainy season.
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