Published June 18, 2026 | Version v1
Software Open

The Community Global Workflow (GW) v1.0.0

Authors/Creators

  • 1. Oceanic and Atmospheric Research
  • 2. Earth Prediction Innovation Center
  • 3. National Weather Service
  • 4. Unified Forecast System
  • 5. Office of Modeling and Development
  • 6. National Oceanic and Atmospheric Administration

Description

NOAA’s Office of Oceanic and Atmospheric Research (OAR)’s  Earth Prediction Innovation Center (EPIC), National Weather Service (NWS)’s Office of Modeling and Development (OMD), and the Unified Forecast System (UFS) community are proud to announce the public release of the Community Global Workflow (GW) v1.0.0 (https://github.com/NOAA-EMC/global-workflow/releases/tag/Community_v1.0.0). This is the first time EPIC is releasing the Community GW framework, which provides an end‑to‑end workflow designed to run global configurations of medium range numerical weather forecasting for the UFS-Weather Model (WM). It is built to support both research and operational implementations. The Community GW v1.0.0 release can be used on NOAA HPC systems, National Science Foundation (NSF) / National Center for Atmospheric Research (NCAR) Derecho, and native Amazon Web Services (AWS) Elastic Compute Cloud (EC2) instances, enabling broad accessibility for the UFS community.

The GW framework is a unified, configurable workflow system that orchestrates all components required to execute a full global forecast cycle. It is a combination of several model components seamlessly integrated into an end-to-end workflow to pre-process, analyze, generate, post-process, and verify forecast data. GW eliminates the need for manual stitching of these components and ensures consistency between operational forecasts and research experiments. The Community GW v1.0.0 supports Global Forecast System (GFS), Global Ensemble Forecast System (GEFS), Global Chemistry and Aerosol Forecast System (GCAFS), and Seasonal Forecast System (SFS) model configurations. Both the Gridpoint Statistical Interpolation (GSI; atmosphere-only) and Joint Effort for Data Assimilation (DA) Integration (JEDI) systems are included. The Community GW v1.0.0 release builds on the joint operational/development workflow developed at NOAA NWS OMD and extends it for community use through EPIC, enabling new users, researchers, developers, and partners to build and run from among many available configurations.

The GW end-to-end framework orchestrates several modeling components through a unified, configurable workflow which include the UFS-WM for forecast generation, GSI/GSI‑Utils/GSI-monitor for atmospheric DA, GDAS (Global DA System) App for transition to the JEDI framework for coupled DA, NOAA Emission and eXchange Unified System (NEXUS) for emissions, GFS‑Utils and UFS‑Utils to run the weather model, and wxflow for workflow management. Forecast verification is performed using OMD’s global verification package, which leverages MET/METplus to compute atmospheric metrics for model runs (as of release, limited to Weather and Climate Operational Supercomputing System (WCOSS) within GW).

GW is built to support both research and operational implementations. The development branch of the GW is continually evolving as the system undergoes open development. The initial release of Community GW (v1.0.0) represents a snapshot of this continuously evolving system. 

Comprehensive documentation, comprising an overview, setup instructions, execution guidance, and testing procedures, is available through the Community GW v1.0.0 User’s Guide. The GW Contributor’s guide is intended for developers who wish to contribute to the project. Required datasets are publicly accessible via AWS S3 buckets. These include OMD’s global data bucket containing fix data, initial condition files, and syndat files required to run supported GW cases (https://noaa-nws-global-pds.s3.amazonaws.com/index.html) and EPIC’s GW v1.0.0 Data Bucket containing files (unrestricted observations) required to run supported GW cases (https://noaa-epic-global-release-pds.s3.amazonaws.com/index.html). Users may seek assistance through GitHub Discussion’s Q&A page or GitHub Issues.

The GW User's Guide is at:  

https://global-workflow.readthedocs.io/en/latest/user_guide/index.html 

The GW Quick Start Guide is at: https://global-workflow.readthedocs.io/en/latest/quick_start.html
The GW Contributor’s Guide is at: https://global-workflow.readthedocs.io/en/latest/contributor_guide/index.html 

 

The GW repository is at: https://github.com/NOAA-EMC/global-workflow/tree/develop 

OMD’s global data bucket is at: https://noaa-nws-global-pds.s3.amazonaws.com/index.html

EPIC’s GW v1.0.0 Data Bucket is at: https://noaa-epic-global-release-pds.s3.amazonaws.com/index.html

 

Notes

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Files

global-workflow-Community_v1.0.0.zip

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Additional details

Dates

Available
2026-06-18
Community GW v1.0.0 release

Software

Repository URL
https://github.com/NOAA-EMC/global-workflow/releases/tag/Community_v1.0.0
Development Status
Active