HRRR Composite Reflectivity image

Earth Prediction Advancement Division

Making Forecasts Better

The Earth Prediction Advancement Division works on combined suites of regional and global models to link atmospheric modeling with atmospheric chemistry, the ocean, and biosphere. This group works extensively with different community groups and has a leadership role with the community WRF-Chem model.

The Earth Prediction Advancement Division is divided into two sections

The Model Physics Section works on suites of physical parameterizations such as the boundary layer, cloud microphysics, land surface, radiation, and convection appropriate for atmospheric models, including scale-aware and aerosol-aware versions. These schemes and combined suites are applied to both regional and global models. This section works extensively with different community groups including the WRF model community.

The Global Earth/Chem Modeling Section works to couple inline chemistry into global and regional atmospheric models, a key component of earth-system models. The work of this Section includes a leadership role with the community WRF-Chem model.

Forecast Models



    FIM Image - Precipitable Water

    GSL's FIM (Flow-Following Finite-Volume Icosahedral Model) uses a unique hexagonal mesh grid to improve modeling of weather systems at all latitudes from very short-range to week 3-4. GSL also has experience on development of non-hydrostatic global models and is involved in initial planning and development toward NOAA's Next-Generation Global Prediction System (NGGPS).


  • HRRR (3km)

    HRRR Composite Reflectivity

    The High-Resolution Rapid Refresh (HRRR) is the only hourly updating model that can predict individual thunderstorms on a 3km grid over the U.S.

  • RAP (13km)

    RAP Surface Temperature image

    The Rapid Refresh (RAP) is NOAA’s North American hourly-updating model system that ingests data from a network of ground and satellite-based sensors, radar, and aircraft.


  • WRF-Chem

    WRF-Chem Image

    GSL leads the development of WRF-Chem (Weather Research and Forecasting - Chemistry), a next-generation coupled weather and air quality prediction system based on the existing Weather Research and Forecast Model.

  • Nowcasting

    LAPS All-sky Image

    EMB scientists are focused on the application of Gridpoint Statistical Interpolation (GSI) to nowcasting applications including RTMA (Real-Time Mesoscale Analysis) and its 3-d counterpart, the Rapidly Updated Analysis (RUA).