Sunny weather What is the weather there?

Weather (including sunny, cloudy, rainy, snowy and foggy)

Sunny, sunny to cloudy, cloudy, cloudy, light (shower), moderate rain, heavy rain, rainstorm, thunderstorm, sleet, light snow, medium snow, heavy snow, hail, frost and fog.

Catastrophic weather:

Typhoon, rainstorm, cold wave, gale, fog, low temperature, frost, high temperature, hail, tornado, dust (blowing sand, floating dust, sandstorm), thunderstorm, blizzard, landslide, debris flow, flash flood and other disastrous weather.

Horizontal flow of wind and air. Expressed by wind direction and wind speed: the wind direction is divided into sixteen directions; Wind speed is expressed in wind scale or m/s, and it is divided into average wind speed represented by 2-minute average situation and instantaneous wind speed represented by instantaneous situation. The intensity of wind is expressed by wind speed, which is generally measured by wind grade or meters per second. There are thirteen grades: still wind, that is, grade 0 wind. Breeze: that is, level 4 wind. Wind breeze with a wind speed of 5.5-7.9m/s: that is, level 3 wind. Strong wind: that is, 8 winds. Average wind speed17.2-20.7m/s wind, gale: 10 wind. Storm: 1 1 wind. Wind hurricane with wind speed of 28.5-32.6m/s: that is, the wind above 12. (Tropical cyclones with the maximum surface wind force 12 or more near the center are called typhoons in the northwest Pacific). Gust: a sudden change in instantaneous wind speed, sometimes accompanied by a change in wind direction, which lasts for a short time. Black wind: a strong sandstorm weather with strong instantaneous wind speed and extremely low visibility. Dry-hot wind: agricultural meteorological disaster weather with high temperature and low humidity and certain wind force. Cold dew wind: Cold damage caused by cold air invasion in autumn, which reduces rice production. Monsoon: the prevailing wind direction changes with the seasons, and it is almost the opposite within one year. Trade wind: a large-scale airflow blowing from the south side of the subtropical high to the low-pressure area near the equator in the lower atmosphere. Sea breeze: the wind blowing from the sea to the land in coastal areas due to the warming of the mainland surface during the day. Land wind: In coastal areas, the surface wind blowing from the land to the sea due to the radiation cooling of the mainland at night. Downburst: A strong downward airflow, usually causing scattered disastrous winds at or near the ground. Wind shear: the spatial variation of wind vector in a specific direction. Mountain wind: in mountainous areas, due to thermal reasons, the wind blowing from the hillside to the valley at night. Valley wind: in mountainous areas, the wind blowing from the valley to the hillside during the day due to thermal reasons. Gale: A sudden strong wind of short duration. Often accompanied by thunderstorms. Generally speaking, the front is the interface between cold and warm air masses. The front is the interface of two air masses with different physical properties such as temperature and humidity, or the transition zone. The intersection of the front and the ground is called the front, also referred to as the front. The length of the front is roughly the same as the horizontal distance of the air mass, from several hundred kilometers to several thousand kilometers, and the width is much smaller than that of the air mass, only a few tens of kilometers, and the widest is only a few hundred kilometers. The vertical height is equivalent to an air mass, ranging from several kilometers to more than ten kilometers. Front can also be divided into cold and warm, dynamic and static. Wind shear is a dynamic instability phenomenon, accompanied by the discontinuity of wind speed between adjacent gas layers. When the plane flies over this area, the elbow will bump. The greater the wind shear, the more the plane bumps and gets hotter. When the warm air mass, the cool air mass and the cool air mass meet, two fronts are formed first, and then one of them catches up with the other, that is, an occluded front is formed. The front is blocked by mountains and the terrain is blocked, which is very common in China; Either the cold front catches up with the warm front, or two cold fronts meet head-on to form a shelter. They force the warm air in front of the cold front to leave the ground and get trapped in the air. We call the interface between the cold air mass behind the cold front and the cold air mass in front of the front a blocking front. Strong convection is short for forced convection. Convective motion of fluid caused by uneven fluid temperature caused by external heating or lifting. Forced convection in the atmosphere is mostly thermal convection. However, the uplift caused by the convergence of weather systems can often also cause dynamic forced convection when air flows through mountains.