What does the deposit percentage on iPhone mean?

The probability of weather precipitation, expressed in percentage, refers to the probability of rain in this city today. The probability of rain is this number within the forecast time and regional scope. It can also be understood that the accuracy of this forecast in the specified time and area is this number. Probability is a mathematical term, and its intuitive meaning refers to the possibility of a thing happening.

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1, precipitation probability refers to the probability of rain in a certain area today. The probability of rain is this number within the forecast time and regional scope. It can also be understood that the accuracy of this forecast in the specified time and area is this number.

Probability is a mathematical term, and its intuitive meaning refers to the possibility of a thing happening. The forecast published in the form of probability is called probability forecast, which originated from the United States in 1966. Popular understanding: under certain conditions (temperature, air pressure, humidity, etc. ), the probability of precipitation in history is 30%. Knowing the forecast of precipitation probability, we can take measures against the weather that may rain to reduce the inconvenience in life.

2. Origin

This kind of weather forecast using probability has been used since 1966 in the United States, 1980 in Japan and 1995 in China. But a more elusive word-precipitation probability is often mentioned. Forecasters often broadcast on TV that the probability of precipitation today is 70%. This precipitation probability means that the probability of rain in a certain area is 70%.

3. Scientific explanation

On the days when the probability forecast is not released, if the certainty of precipitation is 70%, tell the citizens that there is precipitation in this city today, and say that only 70% of the probability is 100%. Therefore, it shows that the release of precipitation probability forecast is an improvement of precipitation forecast. In other words, the release of probability prediction is beneficial to public decision-making.