NOAA’s powerful new supercomputers paved the way for another upgrade to the U.S. Global Forecast System (GFS), NOAA’s primary model for weather prediction.
Today’s upgrade builds on last year’s significant boost to the GFS, which more than doubled the resolution of the model grid from 27 kilometers to 13 kilometers, resulting in higher resolution model output and more precise weather forecasts and warnings.
Today’s shift to 4-D ensemble hybrid data assimilation takes into account how weather systems evolve on a 3-D spatial grid over time, with time now becoming the fourth dimension. This approach makes better use of earth observations used to initialize the model which gives forecasters a more accurate and timely picture of evolving weather situations.