Definition: The probability of precipitation in a weather forecast is an estimate of the chance of a measurable amount of rain or snow falling anywhere in a given forecast region over the forecast period. Probabilities are given in 10 percent increments.
probability of precipitation
By Susan Munroe, About.com Guide
Related Glossary Terms
Explore Canada Online
Must Reads
About.com Special Features
What is a Recession?
Sure, we're all talking about it, but what, exactly, defines a recession? More >
Weird Breaking News
A daily look at some of the oddest (and dumbest) crimes around. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.