We are pleased to announce the release of version 2.1.0 of spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), the Earth Prediction Innovation Center (EPIC), the United States Naval Research Lab (NRL), and the NASA Global Modeling and Assimilation Office (GMAO). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS), the Joint Effort for Data assimilation Integration (JEDI), the Navy Environmental Prediction sysTem Using a Nonhydrostatic Engine (NEPTUNE), and the NASA Goddard Earth Observing System (GEOS) model.

Version 2.1.0 is a minor release over the recently release 2.0.0 code.

Main updates:

• Updated spack engine (submodule) from a fixed tag (version 1.0.2) to the head of develop as of January 9, 2026
• Update of site configurations to use spack version 1 compiler preferences and to install compiler runtime libraries in environments
• Experimental feature: JEDI components oops, ioda, ioda-converters, ropp-ufo, and ufo are deployed as part of the NEPTUNE environments
• New tier 1 container site with dockerfiles for oneapi and gcc that replaces the "spack stack ctr" container builds

Everything That's New

• NASA site configuration updates (NAS, Discover)
• NRL site configuration updates
• EPIC site configuration updates
• S4 and Gaea C5 moved to tier 2
• New tier 1 container site with dockerfiles for oneapi and gcc
• Acorn: add language-specific prefers
• Update w3emc to 2.13.0
• New template neptune-dev-llvm
• Update of met and metplus versions
• New variant gittools for neptune-python-env/neptune-dev
• New package rank-run, part of base-env
• Update g2c and wgrib2 versions
• Bug fixes for bacio and crtm module variables in common/modules_*.yaml
• Updates gsibec, fms, and pfunit versions
• New package codee for neptune-env
• Spackify JEDI components for NEPTUNE-JEDI
• Enable parallel netCDF features in py-netcdf4
• Add bin/compiler to PATH for `intel-oneapi-compilers
• spack-stack extension to check for correct compiler for each package
• Weekly builder: Add option to exclude packages from spack.yaml

Full Changelog: 2.0.0...2.1.0

We are pleased to announce the release of version 2.0.0 of spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), the Earth Prediction Innovation Center (EPIC), the United States Naval Research Lab (NRL), and the NASA Global Modeling and Assimilation Office (GMAO). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS), the Joint Effort for Data assimilation Integration (JEDI), the Navy Environmental Prediction sysTem Using a Nonhydrostatic Engine (NEPTUNE), and the NASA Goddard Earth Observing System (GEOS) model.

This major release of spack-stack updates the spack engine to version 1.0, which treats compilers like any other package, and which separates the spack packages from the spack engine.

This release is limited to a subset of the tier 1 platforms:

• JCSDA: Discover SCU 17 (Intel oneAPI and GNU)
• NASA: NAS (Intel oneAPI / HPE MPT and GNU / Open MPI)
• NAVY: Atlantis ((Intel oneAPI, GNU, and LLVM), Blueback (Intel oneAPI and GNU), Narwhal (Intel oneAPI and GNU), Nautilus (Intel oneAPI and GNU)
• NOAA: Derecho (Intel oneAPI / cray-mpich), Gaea-c6 (Intel oneAPI / cray-mpich), Hercules (GNU / openmpi), Ursa (Intel oneAPI / Intel MPI and Intel oneAPI / HPC-X MPI); Acorn (partial installations with Intel Classic and Intel oneAPI / cray-mpich)

Supported compilers for this release are Intel Mixed (icx, icpx, ifort) 2024.2.0-2024.2.1, Intel LLVM (icx, icpx, ifx) 2025.0.3 and 2025.3.0, GCC 12.2.0-13.4.0, LLVM 21.1.*. In addition, limited support is available from NOAA EMC for Intel Classic (icc, icpc, ifort) 19.1.3.304 on WCOSS2 and Acorn.

Spack containers are not supported in this release. Container support will return in a future release.

All documentation can now be found on the spack-stack wiki. The previous documentation on ReadTheDocs is frozen at release 1.9.3.

What's Changed

Major Updates

• Update to spack version 1.0:
  • Compilers are now packages like any other package
  • Spack packages are now in their own repository
• Updated directory structure:
  • Fork of spack-packages upstream repository in repos/builtin
  • Additional packages in repos/spack-stack
• Update of common configuration, site specific configuration, environment templates, and meta-modules generation to support Spack version 1.0
• All modules are now created in envs/<env-name>/modules instead of envs/<env-name>/install/modulefiles
• Support dropped for spack-built containers
• All documentation can now be found at https://github.com/jcsda/spack-stack/wiki

All Updates

What's Changed

• Update NRL batch install script with capability to create & use bootstrap mirrors by @climbfuji in #1473
• Avoid linking to libirc.so in spack (parallel-netcdf), turn off crypt variant for Python, and update Orion site config to fix tar issue by @climbfuji in #1435
• Update ectrans from 1.2.0 to 1.5.0 in configs/common/packages.yaml by @climbfuji in #1474
• Update spack stack setup-meta-modules to directly set compilers in MPI meta modules by @climbfuji in #1479
• Update NRL batch install script, add configuration for Cole and Tusk by @climbfuji in #1489
• Container image: specify gcc version for gnu toolchain. by @eap in #1496
• Update NRL batch_install.sh: exclude crtm-fix from duplicate check list by @climbfuji in #1497
• Update util/weekly_build/03_SetupEnv.sh: exclude crtm-fix from check for duplicates by @climbfuji in #1498
• Add py-arch and py-regionmask to neptune-python-env by @climbfuji in #1500
• Avoid full rust dependency in cylc environments by @climbfuji in #1519
• In configs/common/packages.yaml, update to met@12 and metplus@6; add to neptune-python-env by @climbfuji in #1481
• Add new tier1 platform Blueback, fix for multiple cray-libsci versions on Narwhal, other NRL site config updates by @climbfuji in #1527
• Add netcdf-{c,fortran} to weekly testing by @AlexanderRichert-NOAA in #1533
• Support multiple versions of same compiler vendor in site config (especially oneapi) by @climbfuji in #1541
• Update setup.sh: add export SPACK_DISABLE_LOCAL_CONFIG=true by @climbfuji in #1545
• Update Blueback packages.yaml: remove external flex by @climbfuji in #1553
• Bump ip from 5.1.0 to 5.3.0 by @climbfuji in #1551
• Require +python for esmf by @AlexanderRichert-NOAA in #1560
• Update to weekly build scripts: avoid scrubbing of environments, update NRL site configs and GitHub actions by @climbfuji in #1568
• Acorn updates, March 2025 by @AlexanderRichert-NOAA in #1571
• Update spack submodule to latest by @AlexanderRichert-NOAA in #1573
• Weekly builds: add option to skip source fetch by @AlexanderRichert-NOAA in #1575
• Remove discover-scu16 configs by @ashley314 in #1576
• Update utils/nrl/batch_install.sh by @climbfuji in #1583
• Feature/update nvhpc config by @stiggy87 in #1580
• Update meta_modules.py to detect MPI modules containing hashes by @rjdave in #1582
• Update Atlantis site config and util/nrl/batch_install.sh: revert temporary changes for NFS move by @climbfuji in #1584
• Update to [email protected]+, use gcc for cmake with intel/oneapi; update eccodes variants; add cloc and py-pytest by @climbfuji in #1589
• Add NCEPLIBS testing to weekly builds by @AlexanderRichert-NOAA in #1591
• Update p4est to 2.8.7 by @climbfuji in #1592
• Fix wrong intel-oneapi-runtime version in Atlantis packages_oneapi.yaml, bump bacio from 2.4.1 to 2.6.0 in JEDI CI container specs by @climbfuji in #1593
• Add [email protected] and use in neptune-dev template by @climbfuji in #1599
• Merge "Gaea updates for 1.9.1 release (#1586)" from release/1.9.0 to develop by @climbfuji in #1600
• Update FIND command for Nautilus in util/weekly_build/sites/nautilus.sh by @climbfuji in #1602
• Stack automation / testing enhancements / bug fixes by @rickgrubin-noaa in #1603
• Update compiler / packages_oneapi configs and instructions for preconfigured sites | orion and hercules by @rickgrubin-noaa in #1606
• Update NRL batch install script: add option to continue build/install in existing directories by @climbfuji in #1609
• Update spack branch spack-stack-dev from spack develop hash a9c879d by @climbfuji in #1607
• Ursa: update openmpi install hash, remove system tar external by @rickgrubin-noaa in #1614
• show_duplicate_packages.py: use spack.lock instead of 'spack concretize' output by @AlexanderRichert-NOAA in #1601
• Add scripts to download cargo dependencies and store in local cargo registry for offline installation by @climbfuji in #1618
• Remove parallel-netcdf dependency except for jedi-mpas-env/unified-dev/skylab-dev by @climbfuji in #1621
• Follow up PR to update of show_duplicate_packages.py by @climbfuji in #1626
• Update Blueback compilers.yaml: add missing path to llvm-ar etc. by @climbfuji in #1622
• Update JEDI CI container GitHub actions (intel -> oneapi, add gcc-11) by @climbfuji in #1625
• Acorn updates; go fetcher by @AlexanderRichert-NOAA in #1623
• Replace [email protected] with [email protected] by @climbfuji in #1632
• Adding HDF5 weekly testing with AWS-Ubuntu2404 setup by @stiggy87 in #1633
• Update container specs (jedi-ci.yaml): hdf5 1.14.3->1.14.5 by @climbfuji in #1636
• Add multiple UFS WM tests to automated build / test by @rickgrubin-noaa in #1629
• Update Nautilus site config: [email protected] -> [email protected] by @climbfuji in #1637
• Update tier2 site blackpearl: [email protected] --> [email protected] by @climbfuji in #1640
• Feature/esmf weekly test by @stiggy87 in #1638
• Support for LLVM 20 with neptune-dev, update to [email protected], [email protected], esmf@8....

We are pleased to announce the release of V1.9.3 of spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), the Earth Prediction Innovation Center (EPIC), the United States Naval Research Lab (NRL), and the NASA Global Modeling and Assimilation Office (GMAO). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS), the Joint Effort for Data assimilation Integration (JEDI), the Navy Environmental Prediction sysTem Using a Nonhydrostatic Engine (NEPTUNE), and the NASA Goddard Earth Observing System (GEOS) model.

Documentation for installing and using spack-stack can be found at https://spack-stack.readthedocs.io/en/1.9.3 and https://github.com/JCSDA/spack-stack/wiki/spack%E2%80%90stack%E2%80%901.9.3-release-documentation

What's Changed

This is a bug fix release for versions 1.9.1 and 1.9.2. Changes w.r.t. version 1.9.1:

• Site config updates and bug fixes for WCOSS2, Derecho, Hercules, Orion, Ursa, Hera
• Bug fixes for scotch and crtm-fix packages
• wgrib2: support variants ipolates and netcdf
• Update met and metplus versions. Note that [email protected] does not compile without older versions of gcc (e.g. [email protected]). See the Known Issues section of the release documentation for a fix
• New tier 1 site NAS (NASA)

Full Changelog: spack-stack-1.9.1...1.9.3

We are pleased to announce the release of V1.9.1 of spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), the Earth Prediction Innovation Center (EPIC), and the United States Naval Research Lab (NRL). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS), the Joint Effort for Data assimilation Integration (JEDI), and the Navy Environmental Prediction sysTem Using a Nonhydrostatic Engine (NEPTUNE).

Documentation for installing and using spack-stack can be found at https://spack-stack.readthedocs.io/en/1.9.1 and https://github.com/JCSDA/spack-stack/wiki/spack%E2%80%90stack%E2%80%901.9.1-release-documentation

What's Changed

Platforms

• Add site configs for NCO WCOSS2, NOAA RDHPCS Ursa
• Add experimental support for DoD HPCMP Blueback, DOD HPCMP ParallelWorks AWS
• Update JEDI CI container from Ubuntu 20.04 to Ubuntu 24.04
• On NRL sites, Hercules, and Orion, use native zlib instead of spack-built zlib-ng

Compilers

• Support for Intel oneAPI compilers in "mixed" mode (icx, icpx, ifort from [email protected] and [email protected])
• Support for [email protected] compilers on macOS and clang@14 on Linux
• Experimental support for Intel oneAPI compilers (icx, icpx, ifx from from oneapi@2025 and later)

Libraries

• Move NEPTUNE Python dependencies into its their own package neptune-python-env
• Updated versions for: ip, gfsio, landsfcutil, sigio, sfcio, eckit, fckit, fiat, ectrans, ecmwf-atlas
• Unpin or update many Python packages, update of py-numpy to 1.26 and py-scipy to 1.14
• Enable ESMF Python interface, update to version 8.8.0
• Update MAPL to 2.50.3
• Add the GitHub CLI to global-workflow-env
• Add py-ruamel to gmao-swell-env
• Enable esdmumps feature for scotch
• New package bufr-query
• Add new templates for Cylc and CCPP-SCM
• Add [email protected]
• Update wgrib2 to 3.6.0 and enable for all compilers (notably Intel oneAPI)

Miscellaneous

• Implement NCO requirements
• Continuous Integration (CI): add weekly build/test scripts
• Add utility for listing pkg versions for spack-stack wiki

Full Changelog: spack-stack-1.8.0...spack-stack-1.9.1

We are pleased to announce the release of V1.8.0 of spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), the Earth Prediction Innovation Center (EPIC), and the United States Naval Research Lab (NRL). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS), the Joint Effort for Data assimilation Integration (JEDI), and the Navy Environmental Prediction sysTem Using a Nonhydrostatic Engine (NEPTUNE).

Documentation for installing and using spack-stack can be found at https://spack-stack.readthedocs.io/en/1.8.0 and https://github.com/JCSDA/spack-stack/wiki/spack%E2%80%90stack%E2%80%901.8.0-release-documentation

New This Release

• Support for Intel oneAPI 2024 compilers (icx, icpx, ifort; experimental: icx, icpx, ifx); update of Intel classic compilers to last release 2023.2 on NOAA platforms
• Bug fixes for Intel classic compilers in spack core code (always pass flags to suppress deprecation warnings to fix meson build errors)
• Support for AMD AOCC version 4 compilers (experimental)
• Minimal mpas-jedi environment with Nvidia compilers (nvhpc)
• New NEPTUNE standalone environment
• Environments now support one principal compiler, but can use other compilers for specific packages (examples: Intel classic environment uses gcc to compile boost; Intel oneAPI environment uses gcc to compile bison)
• Use Intel MKL instead of Openblas in Intel classic/oneAPI environments on all non-NOAA platforms
• Update of Python from 3.10.8 to 3.11.7 and update of numerous Python packages
• Additional packages for unified environment: py-dask, py-xnrl, py-wxflow, command line utilities for eccodes, py-fortranformat, bufr_query
• New versions of [email protected], [email protected] and [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
• Update to Rocky 8 for NOAA RDHPCS Hera, Jet, ParallelWorks
• Update to Rocky 9 for NOAA RDHPCS Orion
• Update of JEDI CI container builds
• New tier 1 platforms Atlantis, Gaea C6
• Update from spack develop as of May 2024
• Documentation updates: split documentation into readthedocs (https://spack-stack.readthedocs.io/en/latest) and a Wiki (https://github.com/JCSDA/spack-stack/wiki)

We are pleased to announce the release of V1.7.0 of spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), and the Earth Prediction Innovation Center (EPIC). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS) or the Joint Effort for Data assimilation Integration (JEDI).

Documentation for installing and using spack-stack can be found here: https://spack-stack.readthedocs.io/en/1.7.0/

New This Release

• Add all packages required to build GEOS-GCM with spack-stack, add geos-gcm-env (thanks to Matthew Thompson from NASA GMAO)
• Extend support for spack-stack to NASA's Discover SCU17 (AMD Milan) partition, update Discover SCU16 (Intel CascadeLake) config
• Update Hera and Jet site configs after transition to Rocky 8
• Add metis and jasper to mpas-jedi-env
• Add fftw and netlib-lapack to jedi-neptune-env
• Add torch/pytorch for gcc and apple-clang environments
• Replace zlib with zlib-ng
• Remove upp from spack-stack installations
• Update ECMWF library versions (eccodes, eckit, fckit, ecmwf-atlas)
• Update esmf to 8.6.0, update [email protected] dependencies (pflogger)
• Update hdf5 to 1.14.3 with backport of floating point exception fixes from hdf5 develop (thanks to Ryan Honeyager from tomorrow.io)
• Update sp, ip, gsibec
• Update OpenMPI version for user systems to 5.0.1
• Bugfix for [email protected] static/fix files
• Bugfix for building py-jupyter server with node/npm
• Limited support for [email protected]
• Update to spack backports/v0.21.1
• Stop packages from access the internet during installation (needed for air-gapped systems)

We are pleased to announce the release of V1.6.0 of spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), and the Earth Prediction Innovation Center (EPIC). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS) or the Joint Effort for Data assimilation Integration (JEDI).

Documentation for installing and using spack-stack can be found here: https://spack-stack.readthedocs.io/en/1.6.0/

New This Release

• Library updates: [email protected], [email protected] with [email protected] in addition to [email protected] with [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected],
• New packages: [email protected], [email protected], [email protected], [email protected], [email protected]
• Support for GEOS SWELL workflow via the newly added geos-swell-env virtual package (available in unified-env and skylab-env)
• Additional environment gsi-addon-env that uses [email protected], [email protected], [email protected]
• Support of [email protected] compiler
• Update of spack stack create ctr extension to build containers with different packages
• Update of spack stack setup-meta-modules extension to work correctly with chained environments
• Bug fixes for Nautilus, Derecho, Hercules
• Alternative [email protected] + [email protected] software stack on Hercules (in addition to the default [email protected] + [email protected] stack) that seems to address the random errors of MPI programs of the default GNU stack

V1.5.1 is a minor update of V1.5.0 with new library versions for NOAA's Unified Forecast System (UFS) and JCSDA's Joint Effort for Data assimilation Integration (JEDI).

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), and the Earth Prediction Innovation Center (EPIC). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS) or the Joint Effort for Data assimilation Integration (JEDI).

Documentation for installing and using spack-stack can be found here: https://spack-stack.readthedocs.io/en/1.5.1/

New This Release

This is a minor update on top of V1.5.0:

• Update of Hercules site config for GNU compiler to fix issues with the Unified Forecast System due to a bug in gcc@11 (move to gcc@12)
• Update of bufr to 12.0.1
• Update of ecmwf-atlas to 0.35.0, enabling tesselation features
• Update fms to 2023.02.01, addition of version 2023.03
• Update of esmf to 8.5.0, mapl to 2.40.3, and update of mapl dependencies
• Update of gsi-ncdiag to 1.1.2
• Bug fix for py-pandas / py-openpyxl
• Various smaller site configuration updates (Python with/without ssl enabled) to fix openssh/openssl library version mismatches

We are pleased to announce the release of V1.5.0 of spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), and the Earth Prediction Innovation Center (EPIC). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS) or the Joint Effort for Data assimilation Integration (JEDI).

Documentation for installing and using spack-stack can be found here: https://spack-stack.readthedocs.io/en/1.5.0/

New This Release

• Support for MSU Hercules, NOAA RDHPCS Gaea C5, NCAR-Wyoming Derecho
• Major update from spack authoritative repository to 0.21.0.dev0
• Use of C++-17 in boost and in several new versions of ECMWF libraries (eckit, fckit, ecmwf-atlas, ...)
• The Python version used by downstream applications of spack-stack is now built by spack (no longer an external package) for most platforms
• Additional CI tests, in particular on macOS M1
• Utility to check for duplicates after concretization
• Utility to check user umask when creating environments
• Fixed several bugs in spack stack setup-meta-modules
• Numerous version updates and bug fixes for packages in the unified environment, including a critical bug fix to scotch (version 7.0.4) and an update of NCEPLIBS-bufr to 12.0.0
• Additional packages for working with cloud resources (awscli, globus-cli)
• Static build options for packages required by the UFS Weather Model for installation on NCO's operational systems

V1.4.1 is a bug fix release specifically for enabling the transition of NOAA's Unified Forecast System (UFS) to spack-stack.

The spack-stack package is a collaborative effort between the NOAA Environmental Modeling Center (EMC), the UCAR Joint Center for Satellite Data Assimilation (JCSDA), and the Earth Prediction Innovation Center (EPIC). spack-stack is designed to support the various applications of the supporting agencies such as the Unified Forecast System (UFS) or the Joint Effort for Data assimilation Integration (JEDI).

Documentation for installing and using spack-stack can be found here: https://spack-stack.readthedocs.io/en/1.4.1/

New This Release

This is a bug fix release on top of V1.4.0:

• Bug fix for the scotch library required for coupled UFS configurations
• Update of bufr from 11.7.1 to 1.12.0
• Update of eckit from 1.23.0 to 1.23.1
• Update of Hercules and Gaea C5 site configurations