How to describe the weather from the weather phenomena such as cloud cover, rainfall, temperature, wind direction and wind speed.

Cloudy: cloudy, cloudy, sunny to cloudy, etc. Precipitation: light rain, moderate rain, heavy rain, heavy rain, heavy rain. Temperature: xx degrees Celsius, wind direction: southeast and northwest wind speed: grade wind speed: for example, the temperature is 2 1 degree Celsius, sunny to cloudy, the southeast wind is 3-4, the temperature is 8 degrees Celsius, there is light rain on cloudy days, and the northwest wind is 1-2.

First of all, cloud cover:

1, sunny: the sky is less than 30% cloudy.

2. Yin: The amount of clouds in the sky accounts for more than 90%.

Second, the rainfall:

1, light rain: the daily precipitation is less than 10 mm.

2. Heavy rain: the daily precipitation is 25.0-49.9mm. ..

3. Thunderstorm: formation precipitation that suddenly stops and is accompanied by lightning and thunder.

Third, the temperature:

1. Frost: Frost is formed because water vapor condenses into white crystals on the ground and the surface of objects with a temperature below 0℃. If the water vapor content is low and there is no frost, it is said that black frost has freezing damage to crops, which is called frost.

2. Freezing rain: raindrops freeze on the ground below 0℃, also known as rainstorm (frozen by fog drops, called rime), which often falls off the power lines, freezing the road surface and affecting communication, power supply and traffic.

Fourth, the wind direction and speed:

Strong wind: expressed by wind vector, consisting of wind mast and wind plume. The wind pole refers to the direction of the wind, with eight directions. The wind plume is represented by 3 or 4 short strokes and triangles, perpendicular to the right side of the wind pole end (northern hemisphere).

Hail: With the violent vertical movement in the cumulonimbus cloud, small hail nuclei repeatedly rise, condense, fall and melt, and grow into small ice cubes with transparent layers, which have an impact on crops.

Extended data

According to the actual situation of the atmosphere, under certain initial and boundary conditions, the equations of fluid mechanics and thermodynamics describing the weather evolution process are solved by numerical calculation, and the method of forecasting the future weather is obtained.

Different from the weather forecast made by synoptic method combined with experience, this forecast is quantitative and objective.

The equation used or based on the forecast is the same as that used in atmospheric dynamics, that is, the equation composed of continuous equation, thermodynamic equation, water vapor equation, state equation and three equations of motion (see atmospheric dynamics equation). These equations include seven predictive factors (velocity components in X, Y and Z directions, U, V, W, V and W, temperature T, air pressure P, air density ρ and specific humidity Q) and seven predictive equations.

Viscous force F, diabatic heating quantity Q and water vapor quantity S in the equation are generally regarded as functions of time, space and these seven forecasting factors, so that the number of forecasting factors is the same as that of the equation, and the equation is closed.

Song Yingjie, the first TV weather program host in China, graduated from Beijing Institute of Meteorology, majoring in meteorological dynamics, and is a senior meteorological engineer.

Member of the 8th and 9th All-China Youth Federation, founding member of the International Association of Meteorological Communication (IABM), member of the professional committee of the Chinese Meteorological Society, and adjunct professor in universities such as Beihang University, Nanjing University of Information Science & Technology and Southwest University. Song Yingjie won the audience's love with his professional background, intellectual image and natural humorous language style.

In 2000, 2002 and 2004, he won the first prize of hosting art of national meteorological program competition for three consecutive years. In 2004, I won the title of "Mr. Meteorologist" as the best host in the national selection of "My Favorite Meteorologist".

References:

Baidu Encyclopedia-Our Weather Forecast