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Welcome to the UFS Community!

This is the central wiki for software that is part of the Unified Forecast System (UFS). The UFS is a community-based, coupled, comprehensive Earth modeling system. The UFS numerical weather prediction (NWP) applications span local to global domains and predictive time scales from subhourly analyses to seasonal predictions. The UFS is designed to support the Weather Enterprise and to be the source system for NOAA's operational NWP applications. You can read more about the UFS on the UFS Portal.

Applications and Components

UFS applications assemble components such as pre-processing, a numerical model, data assimilation, post-processing, workflow, plotting, and verification to support particular forecast requirements. Each distinct software element of an application is called a component. End-to-end applications must be structured in a very specific way for operational forecasts, but it may be easier for others to use a simpler configuration (e.g., one without a full data assimilation system) for research. UFS applications are flexible and can be configured in different ways to meet different needs.

Umbrella Repositories

Each application can be thought of as an umbrella that gathers under it all the components that it needs. These application umbrella repositories pull together all the software components necessary (either via Git submodules or via files with links to "externals"—their component repositories). They often do not contain much source code themselves beyond a user-friendly workflow.

Application Code and Documentation

The UFS project is in the process of moving as much UFS code and documentation as possible to GitHub to support co-development by a broad community of collaborators. The first column in the table below shows the applications that are included in the UFS. The second column shows which applications currently have code in GitHub repositories. The third column indicates which applications have supported releases—including documentation, examples, and user support.

Application	GitHub Repo	Latest Public Release
Short-Range Weather (SRW) / Convection Allowing	ufs-srweather-app	v2.2.0 10/31/2023
Land Data Assimilation (DA) System	land-DA_workflow	v1.2.0 12/11/2023
Hurricane	HAFS	Not scheduled.
Air Quality	AQM	Not scheduled.
Medium-Range Weather (MRW)*	ufs-mrweather-app	v1.1.0, 10/6/2020
Subseasonal to Seasonal (S2S)	ufs-s2s-model	Not scheduled.
Coastal	CoastalApp	Not scheduled.
Space Weather	Not yet available.	Not scheduled.
Marine and Cryosphere	Not yet available.	Not scheduled.

* MRW development continues primarily in the global-workflow repository.