To answer that question, let’s first talk about percent chances for precipitation. Precipitation chances go from 0 to 100% increasing (or decreasing) by 10% increments. I do not use 10% or 90%. I feel if I’m that sure that it is or isn’t going to rain I might as well use 0% or 100%. I also never use a 50% chance for rain….too many jokes about that one. Anytime I mention a chance for precipitation, slight or otherwise, I expect to see some rain on the radar. The higher the probability of rain in the forecast, the greater the area that will be affected and the higher my confidence value. So this is what I mean when I say:

A 20% chance. This is considered a “slight” chance or we can also describe this chance for rain as being in the form of “isolated” showers. In other words isolated equals a slight chance for precipitation. Go about your plans, most areas will remain dry.

A 30 to 40% chance. These probabilities are truly what the word “chance” is all about. There will be showers, more miss than hit but factor rain into your plans. The term “scattered” can also be used to describe this probability.

A 60% chance. This can also be called a “good” chance for precipitation. My confidence value is high. It’s not a question of if but where. Precipitation will be more hit than miss.

A 70 to 80% chance. I use the word “likely” when I describe these percentages. Pretty much a sure bet that you will get wet.

A 100% chance doesn’t even get a qualifier. The forecast reads simple…rain.

I will save the discussion on partly sunny versus partly cloudy for another time. For now I’ll leave you with this advice. Don’t take a chance with the weather; stay tuned to the latest forecast as things do change.