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A forecast that says, for instance, "there is a 10% chance of rain tomorrow," means that on 10 out of 100 days with weather conditions very similar to the conditions expected tomorrow, at least a trace of train has occurred.
Some will disagree with this answer for various reasons. For the results of research that evaluated how understanding of percentage chance of precipitation varies around the world, see "A 30% Chance of Rain Tomorrow: How Does the Public Understand Probabilistic Weather Forecasts?," available as a PDF file via the URL http://www.mpib-berlin.mpg.de/en/mitarbeiter/gigerenzer/pdfs/RainFinal.pdf .
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Is it 40 percent of the area that will receive rain if there is a 40 percent chance of rain?
No, 40% chance of rain is How Likely it is to rain for that day,or week. Not Area. LOL
If there is a 75 percent chance of rain on Monday and a 25 percent chance of rain on Tuesday what is the probability of rain on either Monday or Tuesday?
thirteen sixteenths.
Does a thirty percent chance of rain really mean it will rain?
A thirty percent chance is a low probability, so it probably won't rain, but it could.
Does 60 percent of rain means its going to rain?
No. A 60% chance of rain means exactly what it sounds like: there is a 60% chance that it will rain. This also means that there is a 40% chance that it will not rain.
Is 80 percent means that it is going to rain?
Not neccessarily, there's a 20% chance it can rain.
Does 40 percent chance of rain mean that it will rain?
A 40 percent chance of rain means that there is a probability of 40 percent that it will rain. It is not a guarantee that rain will occur, but rather an estimation of the likelihood.
Is it 40 percent of the area that will receive rain if there is a 40 percent chance of rain?
No, 40% chance of rain is How Likely it is to rain for that day,or week. Not Area. LOL
What does a 40 percent chance of rain mean?
A 40 percent chance of rain means that it is slightly more likely that there will not be rain. Sixty percent chance of rain is the opposite. It is slightly more likely that it will rain than not.
If there is a 75 percent chance of rain on Monday and a 25 percent chance of rain on Tuesday what is the probability of rain on either Monday or Tuesday?
thirteen sixteenths.
Does a thirty percent chance of rain really mean it will rain?
A thirty percent chance is a low probability, so it probably won't rain, but it could.
If there is 20 percent chance of rain tomorrow will it rain?
Probably not
What is the chance of rain on Thursday?
in percentage it is just equal to 100- percent of no chance of rain on thrusday
What does 30 percent chance rain mean?
A 30 percent chance of rain means there is a 3 in 10 chance it will rain in the specified area. It does not indicate the amount of rain that may fall, only the likelihood of precipitation occurring.
Does 60 percent of rain means its going to rain?
No. A 60% chance of rain means exactly what it sounds like: there is a 60% chance that it will rain. This also means that there is a 40% chance that it will not rain.
What does 70 percent chance of rain mean?
It means that it will probably rain.
There is a 20 percent chance of rain today and a 80 percent chance of rain tomorrow If the two events are independent what is the probability that it will rain today or tomorrow?
0.20 + 0.80*0.80
Does a 50 percent chance of rain mean that it will rain?
You don't know. Theres a 50/50 chance that it will and then a 50/50 chance that it won't.
