Is it necessary to watch the weather forecast?

Many people will check the weather forecast during the rainy season. However, the weather forecast says that the probability of precipitation is 50%, or not? Wait, some very professional words don't understand what they mean even if they are seen. Watch the weather forecast report in detail today ~

Definition of precipitation probability

A) The average probability (%) of rain or snow with precipitation above 1mm in a certain period in the forecast area is 0, 10, 20, …, which is expressed by 100% (rounded in the meantime).

B) The probability of 30% precipitation means that in the 100 forecast, precipitation above 1mm will occur for about 30 times, which is not forecast precipitation.

To put it simply, the precipitation probability is the probability that it will rain more than 1 mm, and the 30% precipitation probability means "when 100 precipitation events are released, about 30 precipitation events exceed 1mm". It doesn't matter whether the probability of precipitation is 50% or 60%.

Unclear professional vocabulary

Sometimes it rains on cloudy days, so it doesn't count. The probability forecast with numbers, such as "0% probability precipitation", cannot be determined because it is only "probability", but as a criterion, if it exceeds 40%, it can be said that the probability of rain is very high. Therefore, according to the weather forecast, when the probability of precipitation is above 40%, I suggest you take an umbrella with you.

Confused weather vocabulary

It's completely different from "it rains for a while" and "it rains for a while"

At first glance, "time" and "instant" are very similar, but their meanings are completely different. "Sometimes it rains on cloudy days" means that it rains below the forecast period 1/2, and "cloudy days" means that it rains below the forecast period 1/4. In other words, sometimes it rains longer.

"It sometimes rains on cloudy days" 12 It may rain for more than 3 hours and less than 6 hours from 6 am to 6 pm.

During the 12 hour period from 6 am to 6 pm, the rainfall may be less than 3 hours.

Therefore, if it rains for three hours in the morning, it can be said that it will not rain in the afternoon.

Determine the weather conditions in various ways.

The reliability of weekly forecast can refer to "A, B, C" of official website of Meteorological Agency.

If you have plans for the weekend, you will refer to the weekly forecast, but you often hear the complaint that "the weekly forecast is not accurate …". When watching the weekly forecast, don't just watch TV, but also look at the website of the Meteorological Agency. There are English letters "A, B, C" under the forecast, and the reliability of the forecast from C to A will be higher and higher.