Texas A&M atmospheric scientist Kenneth Bowman and graduate student Cameron Homeyer are using weather observations and forecasts, along with a computer model Bowman created, to predict the path that air passing over Japan's Fukushima nuclear power plants could take in following days. Short term predictions for a few days are reasonably accurate, but projections beyond four or five days have the same limited reliability inherent to all weather forecasts. Bowman also cautions that these models only predict the paths that air will follow and not how much radioactivity will spread. Much is still unknown about the altitude and magnitude of the releases and currently the only knowledge of how much radioactivity was released comes from news reports.