On April 25th, China Weather Network reported that there were strong convective weather in Shanghai and Jiangsu in East China, especially the spectacular arc cumulonimbus clouds in Shanghai, which surprised many people. Moreover, the storm swept the whole city, and even Dabai was blown away by the wind. In fact, the frequent typhoon and rainstorm climate in Shanghai is due to the fact that Shanghai is located in East China and entered the summer weather earlier. At this time, the weather often alternates between hot and cold, which is very prone to strong convective weather. Once influenced by strong Lei Yun, there will be thunderstorms and strong winds in Shanghai, so typhoons and rainstorms often occur in Shanghai.

The arc cumulonimbus cloud in Shanghai this time is due to the Lei Yun accumulation caused by the fluctuation of temperature in Shanghai in recent days, and the frequent alternation of cold air and warm and humid air. This strange cloud full of water vapor is generally a precursor of heavy rain, which usually means the change of wind power and direction. Especially in the beginning, the wind will strengthen at first. On that day, strong winds of magnitude 7-9 occurred in most parts of Shanghai, and the local gale weather was 1 1. Then the rainfall suddenly increases, and the maximum hourly rainfall intensity can reach 25 mm.

In geography class, we learned that Shanghai is located in the south and is a southeast coastal area. In summer, it is mostly southeast wind, which is influenced by ocean current and wind direction. The coastal areas of Shanghai, Zhejiang and Fujian will be affected by typhoon weather, so many rainstorms will be felt in summer. The arc cumulonimbus clouds seen by many onlookers in Shanghai cover almost the whole of Shanghai. Netizens have said that after the appearance of this cloud, the rainfall was significantly greater, and even the wind reached 1 1, which was caused by cold and warm convective air, and a formal notice of the arrival of the storm was issued.

According to the forecast of the Meteorological Observatory, the rainstorm and windy weather in Shanghai will last for 2 to 3 days, the wind will gradually weaken and the precipitation intensity will decrease day by day, but there will still be more clouds and short-term light rain.