CCTV broadcasts the weather forecast every day, the first broadcast is () A. Urban weather forecast B. Ocean weather forecast C. Satellite cloud picture.

The satellite cloud image of China Central Meteorological Observatory was taken from Fengyun-1 and other meteorological satellites. Using satellite cloud images for analysis can improve the accuracy of weather forecast.

Weather forecast is usually divided into three types: short-term weather forecast (2 ~ 3 days), medium-term weather forecast (4 ~ 9 days) and long-term weather forecast (10 ~ 15 days or more). CCTV mainly broadcasts short-term weather forecast every day.

Extended data

There are several ways to predict elements:

1, empirical prediction method

Based on the situation forecast of the weather map, the future weather distribution is predicted according to the future position and intensity of the weather system. For example, when the low pressure moves and strengthens, it can be predicted that there will be rainy weather or heavy precipitation in the future.

2. Statistical forecasting methods

Analyze the historical data of weather, seek the correlation between the change of atmospheric state and the previous meteorological factors, screen the forecast factors by using regression equation and probability theory, and establish the forecast equation. So as to obtain the required predicted value. The effect of this method mainly depends on the correct choice of factors.

3. Dynamic statistics

The future meteorological parameters calculated by numerical forecasting method are used as forecasting factors, and a set of forecasting formulas are obtained by regression equation to forecast the factors. With the improvement of numerical model, the accuracy of this method may be improved steadily.

Baidu encyclopedia-weather forecast