NOAA's US Global Forecast System has gone 4D, thanks to the power of its new supercomputers. The agency has added "time" as a fourth dimension to its weather and climate model, allowing GFS to make hourly forecasts for up to five days out. Before the upgrade, GFS could only deliver forecasts for every three hours, which isn't exactly bad. But hourly forecasts allow first responders and disaster relief operators to plan their best course of action. Not to mention, people can use that kind of info in their daily lives, say to plan their commutes and avoid being on the road in the middle of a raging hurricane.