During the national day in the northern region, it entered the winter instantly. Why did the weather suddenly change dramatically?

This time, because of the strong convective weather in the north, the weather forecast cannot be accurately predicted, so tourists will be caught off guard. Due to the sudden strong convective weather, many kinds of disasters and great destructive power, it often causes serious disasters. At present, there is no effective method to artificially weaken and prevent it. Therefore, the strategy of combining prevention with rescue should be adopted.

Strong convective weather refers to sudden, fast-moving, violent and destructive weather, mainly including thunderstorms, hail, tornadoes, local short-term heavy rainfall and squall lines. Strong convective weather occurs in convective cloud system or single convective cloud block, which belongs to small and medium-scale weather system in meteorology and has small spatial scale. Generally, the horizontal range is about ten kilometers to two or three hundred kilometers, and some horizontal ranges are only tens of meters to ten kilometers. Its life history is short, with obvious suddenness, about one hour to more than ten hours, and the shorter one is only a few minutes to an hour.

The so-called squall in meteorology refers to the sudden strong wind phenomenon that the wind direction suddenly changes and the wind force suddenly increases. Squall line refers to the weather change zone where the wind direction and wind force change dramatically. Thunderstorm, rainstorm, gale, hail, tornado and other disastrous weather phenomena can occur along the squall line. It often occurs before the arrival of thunderstorm clouds or cold front, and it is most likely to occur in cumulonimbus clouds in spring and summer. Squall lines mostly occur in the evening to night.

When strong convective weather comes, it is often accompanied by severe weather such as thunder and lightning, wind and rain, which causes houses to be destroyed, crops and trees to be destroyed, telecommunications traffic to be damaged, and even casualties. So when you travel, you must pay attention to safety and emergencies.