what does 30 chance of rain mean?

Heather’s Weather Whys: What does a 30% chance for rain mean?

For example, a 30 percent chance of rain may mean 100 percent confidence that only 30 percent of the forecast area is going to get rain. … You can also get a roughly 30 percent POP with 80 percent confidence that 40 percent of the forecast area will get rain, and so on and so forth.

Our meteorologist explains what ‘30% chance of rain’ really means | Your Morning