Believe it or not, there is actually a mathematical formula for calculating a rain chance percentage.

Ever see those precipitation percentages in the weather forecast and wonder how meteorologists decided on that number?

It's one of the most visible parts of our forecasts, but also one of the most misunderstood as well. Here’s more about the ...

BUFFALO, N.Y. (WIVB) — In a typical forecast, you often hear or see the words “probability of precipitation.” This value is given as a percentage. Although this value is frequently seen and used, ...

MYRTLE BEACH, SC (WMBF) - When you’re watching our newscasts you will see our WMBF First Alert Weather team forecasting a percent chance of rain. But what does that actually mean? We’re breaking down ...

QUAD CITIES, Iowa/Ill. (KWQC) - Have you ever wondered what the terms “isolated” or “scattered” actually mean, or how meteorologists come up with the percentages for the chance of rain? A lot of times ...

For years, social media users have been lecturing one another about what percentages mean in weather forecasts. "Y'all know on the weather app the percentage isn't a "chance" of rain. It means it will ...

Forecasting the weather is by nature an imprecise science, and that’s why we use probability when determining the likelihood of rain, snow, or otherwise. “Probability of Precipitation” is what that ...

Rainfall-induced landslides often result in significant human and property losses, and reliable rainfall thresholds can effectively mitigate the hazards associated with them. However, constructing ...

LANSING, Mich. (WLNS) — Probability of precipitation (PoPs) is one of the most common elements of a forecast you see on websites and weather apps, including our own StormTracker6 weather app and WLNS ...