What is the rainfall probability in the weather forecast?

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.

Extended data:

Forecasters predict the percentage of precipitation opportunities in a certain area and a certain period of time through sorting, analysis, judgment and discussion based on various meteorological data. This is only the "probability" of forecasting precipitation, and it cannot guarantee 100%.

In the next 36 hours (every 12 hours 1 period), there will be precipitation opportunities above 0. 1 cm in three periods, regardless of precipitation time and region.

When arranging activities, it will not rain, and make proper preparations for rain; The probability of forecasting precipitation is 60%, and the activities are mainly rainy, supplemented by no rain; The probability of forecasting precipitation is 80%, so be prepared for rain.