Front weather of quasi-static front

The cloud system of quasi-static front is mainly divided into two types, and the corresponding weather phenomena are rain and no rain, as shown in figure 1. The quasi-static front shown in figure 1a is under high pressure control. The warm air above the front is dry, the vertical movement is small, and no obvious clouds are formed. The wet and cold air below it rises along the terrain to form stratocumulus clouds, which will bring sporadic precipitation or no precipitation. Figure 1b shows a lot of precipitation. The strong upward movement of warm air above the front will form a large number of cloud systems such as nimbostratus and high-level clouds, which will bring a lot of precipitation. If the front slope is large and the ground convergence is strong, the precipitation area starts from the front, and the position of the northern boundary of the rain area is often consistent with the position of the 700 hPa shear line. When the quasi-static front stops somewhere, it will cause continuous rainy weather in this area.