The storm in Texas, USA, caused a large area of power failure. What weather phenomenon does the storm belong to?

Storm weather is a kind of extreme weather, which generally refers to the weather process when strong weather systems transit, especially the weather accompanied by strong winds or heavy precipitation, such as thunderstorms, hail, tornadoes, typhoons, tropical cyclones and tropical storms. Abnormal sea surface fluctuations caused by typhoons or strong tropical cyclones often overlap with astronomical tides, leading to rising coastal water levels and storm surge disasters. It is divided into typhoon storm surge disaster and temperate storm surge disaster. The former mostly occurs in the sea areas affected by typhoons, while the latter occurs in the northern waters of China.

In recent years, storms have occurred more and more frequently. On the one hand, it is due to the natural function of the atmospheric environment, on the other hand, man-made destruction of the natural environment is also an important factor causing frequent storms. Strong convection makes the air heated unevenly, resulting in pressure difference and power. A strong downward airflow is formed in front of the convective cloud, and the downward airflow reaches the ground to form a strong wind. However, due to the continuous formation or movement of convective clouds, heavy precipitation has been formed. In large-scale ascending areas (such as cyclones and front centers) and deep convective clouds, the top of the mixed layer rises to the tropopause and actually becomes an inversion layer. In these areas, the air in the boundary layer is full of water vapor and pollutants, which can be freely mixed with the air in the free atmosphere.

When stormy weather and the front cross the land, the front inversion is initially located at the top of the new boundary layer (between the top of cold air and the upper warm air). But after a day or two, after the clouds disappeared, the daily cycle of radiation heating and cooling was induced on the ground again, and a new boundary layer was formed under the front inversion layer, the thickness of which was the foothills. This kind of multi-layer inversion layer (front inversion at the top and above the mixed layer) is often seen in high-altitude exploration. The large-scale destruction of the natural environment has also brought disaster to people. The most important aspect of reducing rainstorm weather is to reduce the damage to the natural environment; At the same time, it is also an important measure to increase vegetation and reduce the losses caused by heavy rain.

Preventive measures are essential for stormy weather. Before the storm comes, doors and windows should be closed, and the outdoor structure should be firm and tight. If you are outdoors, don't stand under tall buildings, trees or billboards. All outdoor activities should be suspended. In addition, we should also pay attention to the hidden dangers of fire, so as to avoid the fire taking advantage of it and causing great losses.

Blizzard is a factor that cannot be ignored, and doing a good job in snow disaster prevention is an important aspect to reduce the harm of snow disaster. Stormy weather, especially when tornadoes appear, is usually accompanied by thunderstorms and hail, which is different from the general strong wind. When the wind is strong, people's hearts are depressed and the wind is powerful and destructive. The wind speed of the hurricane is very small, ranging from tens of meters to hundreds of meters in diameter, and the maximum duration is about 1000 meters. Generally, it doesn't take more than a few minutes, and the longest duration can reach tens of minutes. However, its influence is very small and destructive. Where hurricanes pass, trees are often pulled up, vehicles overturned and buildings destroyed, causing casualties.