Is the "local rain" on the Internet true? What is the phenomenon? Great god asks for advice

There used to be a joke: grandma looked at the weather forecast and said, "Some people are really poor. It rains every day." Recently, it has also been reported that it rains every day. Many friends will also ask, where are the parts? Let's see why there is rain in some areas ~ ~ ~ Now the weather situation is that the overall southerly wind is strong, the upper trough moves eastward, and the overall stratification is unstable, which is easy to cause convection.

Generally speaking, the forecast of sunny and rainy weather refers to a range of forecast, refers to the forecast conclusion of a certain area, and is also a region for the rainfall cloud system. If the forecast area is wide, the rainfall cloud system cannot cover the whole forecast area, and there may be rain in some areas.

In the region, especially in summer, the area of convective clouds is generally much smaller, and it often rains in Tianhe, Panyu and even the Pearl River New Town. For the current weather forecasting technology, this small-scale local precipitation can only be seen from a large-scale situation, which is unstable and easy to cause convection. It is difficult to report this rainfall point in short-term forecast. When there is rain and it is impossible to predict the exact rain point, the short-term forecast will report that there is rain in the local area. Specific rain spots can only be supplemented by short-term monitoring products.

Of course, with the increase of monitoring stations, the monitoring network becomes more and more dense, and the improvement of monitoring data density can improve the accuracy of numerical model prediction, and the accuracy of numerical model prediction is also gradually improving.