What weather system causes strong winds?

Cyclones, cold air, thunderstorms, squall lines, tornadoes and other weather systems can cause many strong winds. Cyclone is a horizontal vortex whose central air pressure is lower than the surrounding air pressure, which is commonly called low pressure. In the northern hemisphere, the air in the cyclone area flows counterclockwise, while in the southern hemisphere, it is just the opposite. Because the air pressure in the cyclone center is lower than that in the surrounding area, air flows into the center from all directions, causing strong winds.

Cold air: When the cold air moves south, the cold air mass plays a leading role in pushing the warm air mass to move south. The interface between cold air mass and hot air mass is a cold front. A cold front is what people often call a cold air front. Depth Charge, where cold air moves southward, is also the most common weather system affecting China. Due to the large pressure difference between the two sides of the front, it will cause windy weather. When the cold front crosses the border, the air pressure rises sharply, the temperature drops sharply and the wind direction turns clockwise. After the cold front crossed the border, the temperature dropped, the air pressure rose and the weather turned fine.

Thunderstorm: It is weather accompanied by thunder and lightning, showers and strong winds, and it is produced in strong cumulonimbus clouds. Thunderstorm gale has obvious diurnal variation and short duration. It usually occurs in the afternoon when the temperature rises the highest, and usually lasts for several minutes to several minutes. The wind area is also small, and the wind direction changes with the movement of the cumulonimbus cloud bottom.

Squall line: refers to the small and medium-sized strong convective weather with abrupt changes in wind direction and wind speed formed by banded thunderstorms. The width of thunderstorms ranges from less than one kilometer to several kilometers, the widest to dozens of kilometers, the length generally ranges from dozens to hundreds of kilometers, and the maintenance time ranges from several hours to more than ten hours. The squall line appeared unexpectedly.

Tornado: It is a funnel-shaped cloud column connected with cumulonimbus clouds, which sometimes sticks out and hides, and sometimes hangs in the air or touches the ground. The scale of tornado is very small, and the central air pressure is very low, resulting in a large horizontal pressure gradient and a high wind speed, which is generally estimated to be 50 ~150m/s, and the maximum can reach 200m/s. Tornadoes are extremely destructive. Where they pass, they often pull up trees, overturn vehicles, destroy buildings and even take people away.