Kunming quasi-static front, also known as Yunnan-Guizhou quasi-static front, is an atmospheric phenomenon in Yunnan-Guizhou Plateau, which is mainly formed by metamorphic polar continental air mass and southwest airflow blocked by Yunnan-Guizhou Plateau topography. Clouds are low and thin, and it is easy to form continuous rainy weather.
This weather phenomenon mostly occurs in winter, and the number of winter days accounts for about half of the whole year.
The "three sunny days" in Guizhou Plateau are related to the quasi-static pre-stop activities in Kunming. The front area is mostly located between Guiyang and Kunming, with a slightly northwest-southeast trend.
Stop in front. The quasi-static front in Kunming is due to the fact that the cold air in the south is blocked by mountains and the warm air on the front is dry and slowly rising.
Slow, can not produce a large range of cloud systems and precipitation, cold air mass under the front contains more water vapor, sliding up the hillside. Coupled with turbulence and mixing, it is easy to form stratocumulus clouds or thick nimbostratus, often accompanied by continuous precipitation.