Akemi Iwaya is a devoted Mozilla Firefox user who enjoys working with multiple browsers and occasionally dabbling with Linux. She also loves reading fantasy and sci-fi stories as well as playing "old school" role-playing games. You can visit her on Twitter and Google+.
Weather forecasts in the U.S. (and many other areas of the world) use Probability of Precipitation to forecast rain; the percent (i.e. 40%) indicates the probability that rain will occur at any given point within the geographic region the forecast covers and not the absolute probability of rainfall for the entire region.