Heavy rain in Shanghai, how many millimeters of precipitation is expected in the future?

On July 6, affected by heavy rainfall, the rain on the platform along the Bund formed a gurgling river, and the lower stairs formed a small one. Waterfall? Although this is a difficult sight to see, it also makes it more difficult for people to travel. On the same day, the Shanghai Meteorological Center upgraded the blue rainstorm warning to the yellow rainstorm warning. It is estimated that the accumulated rainfall will reach more than 80 mm in the next six hours.

The rare rainstorm brought coolness to Shanghai, but it also made it more difficult for people to travel. The Shanghai flood control department also immediately launched the city's three-level response to flood control and typhoon prevention, and encouraged the citizens of the city to reduce their travel and actively cooperate with flood control and typhoon prevention to ensure the personal and property safety of citizens during the rainstorm.

From late June to mid-July every year, it is a rainy period in Jianghuai, northern Jiangnan and other areas. During this period, the rainfall in these areas will be the most in a year. The formation of Meiyu period is actually the interaction of multiple monsoons. The southwest monsoon, the South China Sea monsoon and the southeast monsoon will meet in the air, and the water vapor in the air will condense to form raindrops and land in Jianghuai, northern Jiangnan and other areas.

Since June this year, the intensity of subtropical high system has been stronger than in previous years. The warm and humid air currents on the west and north sides of the subtropical high continuously transport water vapor to Jiangnan and South China. At the same time, the vortex in the northern upper trough is active, which makes the cold air very active. When a large amount of water vapor meets cold air, it forms a long and narrow rain belt with great intensity. Moreover, this rain belt frequently travels between the north and south of the Yangtze River, forming the rainy season with the most concentrated and strongest rainfall.

Now, Shanghai has entered the 28-day rainy season. When will it come out of it? Zhu Jiehua, director of the decision-making service center of Shanghai Central Meteorological Observatory, said that there will be no plum blossom this week. This year's rainy season lasts for 33 days, which is the longest and the most rainy year in 20 years. During the college entrance examination every year, it always rains continuously. This year, affected by the epidemic, the college entrance examination was postponed to July, which was more important with the rainy season and also sent coolness to candidates.