IBM to Deliver World’s Highest-Resolution Weather Model

Weather Underground’s Jeff Masters wrote this about the new model.

IBM announced today that they will be introducing the world’s highest-resolution global weather forecasting model later in 2019–the IBM Global High-Resolution Atmospheric Forecasting System (GRAF). The model will be the first hourly-updating weather model that is able to predict something as small as a thunderstorm virtually anywhere on the planet.

The current top global forecasting models, the European (ECMWF) model and the U.S. GFS model, subdivide the global atmosphere into grid boxes that average 9 kilometers and 13 kilometers on a side, respectively, then solve the mathematical equations of atmospheric flow to generate a forecast for each of those grid cells. The new GRAF model employs a variable-resolution grid, resembling a honeycomb, that can be configured with higher resolution over areas of particular interest (Figure 1). Over land areas, the GRAF grid elements will have average resolutions of 3 km, which is about 3 – 4 times greater than the European and GFS models.

The entire article is here:

Categories: Weather Blog