Is it related to the continuation of showers and typhoons? After the high temperature returns, the local rainstorm in Shanghai will continue into tomorrow's water vapor | typhoon | relationship
On the last day of the first summer of the dog days, Shanghai was hit by pouring rain. Some netizens described that the rain in Shanghai today was like pouring out of a basin, catching many office workers off guard. According to a survey by the Shanghai Meteorological Service Center, nearly 60% of surveyed netizens stated that they were significantly affected by heavy rainfall on their way to work today.
According to the rainfall statistics of the Shanghai center Meteorological Observatory, from 20:00 yesterday to 16:00 today, it rained heavily all over the city, and rainstorm occurred in Chongming, Baoshan, Jiading, Jinshan, Fengxian and other suburbs, with local heavy rainstorm. At around 15:31 today, the temperature in the central urban area was lowered to 26.3 ℃ by rainwater, and the highest temperature throughout the day was only 27.4 ℃, which can be said to be the coolest day after the emergence of plum blossoms.
In the past two days, there has been widespread rainfall in southern China, but the causes are slightly different. It is necessary to mention the initial typhoon "Taili" that just made landfall in China. Although the weakening Typhoon Tai Li was stopped from being numbered by the Central Meteorological Observatory as early as the 18th, its residual cloud influence still exists. The rainfall in the eastern regions of Guangxi, Guizhou, and Yunnan is influenced by the low-pressure circulation of Typhoon Taili.
The rainfall in the Yangtze River Delta region is mainly caused by convection at the edge of the subtropical high pressure. Today, the convective activity in the Jiangsu Zhejiang Shanghai region is active, and many places are taking turns to make it onto the national hourly rainfall chart, competing and competing——
At 11 o'clock today, Jiading ranked first in the country with 48.6 millimeters of hourly rainfall, followed by Qidong in Jiangsu with 30.8 millimeters; At 12:00, Chongming broke the list with 65.6 millimeters of hourly rainfall, becoming the number one in the country; As the convection in Zhejiang gradually developed and increased, by 2:00 pm, Pingyang, Beilun, Hongjia, and Ninghai in Zhejiang rushed into the top four in the country.
Where did all this rainwater come from? In fact, the impact of weather is interrelated. The meteorological experts from the Shanghai Meteorological Bureau said that the rainfall in Shanghai is mainly due to the abundant water vapor brought by the southwest jet stream at the edge of the subtropical high pressure, but it is also mixed with the indirect impact of typhoons, including the contribution of Typhoon Taili.
The forecast shows that there will still be showers or thunderstorms in Shanghai from tonight to tomorrow. Although the time and scope of the rain is not comparable to today's day, the rainfall in some areas can still reach rainstorm, and the short-time wind is also strong during thunderstorms. The temperature will rise tomorrow, and the morning is relatively comfortable. The lowest temperature is 26 ℃, and the highest temperature during the day can reach 32 ℃.
In summer, coolness is brief, while heat is the norm. Starting from Saturday, Shanghai is under the control of a subtropical high pressure, with high temperatures returning and the highest daily temperature near the 35 ℃ high temperature line. At that time, there will still be frequent showers in Shencheng due to high temperatures, sufficient energy in the atmosphere, active convective cloud clusters, and short-term hot thunderstorms in some areas in the afternoon.
Starting from tomorrow, Shanghai will enter the middle of the three hottest days. This year is an extended version of the dog days, which lasts for 40 days. The biggest difference between it and the regular version is the length of the midsection. The extended version of the dog days is 20 days, which is 10 more days than the regular version.
From a national perspective, the dog days are the hottest time of the year. According to meteorological data from over 2000 meteorological stations in China, the majority of areas are the hottest during the "three dog days". The south is the hottest during the "mid dog days", the north is the hottest during the "head dog days", and the coastal areas are the hottest during the "last dog days".
In a specific city or year, the prolonged period of the dog days may not necessarily be hotter. Meteorological experts explain that there is no direct correlation between the length of the "three hottest days" and the number of days of high temperatures. Although the hottest days are known as the "Sanfu", the occurrence of high-temperature days is closely related to atmospheric circulation, the location, intensity, and control time of subtropical high pressure. In addition, the number, intensity, and path of typhoons each year are also important factors affecting the cool and hot weather in many regions of China. If coastal areas are continuously hit or affected by strong typhoons during the dog days, it is highly likely that the year will be a cool summer.
