"It's been 20 days since San Antonio saw measurable rainfall, but a change in the weather pattern could bring thunderstorms back to the forecast. Today, there's just a 20 percent chance of an isolated storm during the afternoon, rising to a 30 percent chance by Saturday. Even higher rain chances will arrive early next week, especially late Monday and into Tuesday. Forecast models show mainly light rainfall totals, less than an inch around San Antonio. However, isolated higher totals, up to three inches, could produce flooding. Be sure to stay up to date with the latest forecast at Express News dot com slash weather."