Sync WW3 develop to dev/ufs-weather-model

[mingchen-NOAA]

Pull Request Summary

This PR sync develop to dev/ufs-weather-model

Description

Routine sync of develop to dev/ufs-weather-model.
Including the following commits:

• Communication is added after boundary conditions are applied in PDLIB_JACOBI_GAUSS_SEIDEL_BLOCK to enable bit for bit reproducibility across different numbers of MPI processes.
  Three new regression test cases added:

ww3_tp2.17/./work_ice_restart                     (directory not found)
ww3_tp2.17/./work_iceB                     (directory not found)
ww3_tp2.17/./work_ice                     (directory not found)

• Scaling of lateral boundary conditions by group velocity are simplified for cases with switch PDLIB
  Changes in regression test results:

ww3_tp2.17/./work_b                     (10 files differ)
ww3_tp2.17/./work_ice_restart                     (33 files differ)
ww3_tp2.17/./work_c                     (10 files differ)
ww3_tp2.17/./work_iceB                     (44 files differ)
ww3_tp2.17/./work_mc                     (6 files differ)
ww3_tp2.17/./work_ice                     (44 files differ)
ww3_tp2.17/./work_mc1                     (6 files differ)
ww3_tp2.17/./work_mb                     (6 files differ)
ww3_tp2.19/./work_1A_a                     (9 files differ)
ww3_tp2.19/./work_1C_a                     (9 files differ)
ww3_tp2.19/./work_1B_a                     (9 files differ)

• Added a test within regtest ww3_tp2.17 to illustrate a failure of restart reproducibility when variable water level is present and the domain has deep bathymetry
  Three new regression test cases added:

ww3_tp2.17/./work_deep                     (directory not found)
ww3_tp2.17/./work_deepB                     (directory not found)
ww3_tp2.17/./work_deep_restart                     (directory not found)

• Fix failure of restart reproducability in cases with variable water level and deep bathymetry. In subroutine W3ULEV KDCHK computed from bathymetric depth rather than total water level
  Change in regression test results:
  ww3_tp2.17/./work_deep_restart (32 files differ)
• Add a unique NDSTABSPC for each point for ww3_outp ITYPE=1, OTYPE=3
  No change in regression test results.
• revert grib2 back to jpeg
  Changes in regression test results:

ww3_tp2.17/./work_ma                     (1 files differ)
ww3_tp2.17/./work_b                     (1 files differ)
ww3_tp2.17/./work_ma1                     (1 files differ)
ww3_tp2.17/./work_ice_restart                     (1 files differ)
ww3_tp2.17/./work_c                     (1 files differ)
ww3_tp2.17/./work_deep                     (1 files differ)
ww3_tp2.17/./work_iceB                     (1 files differ)
ww3_tp2.17/./work_deepB                     (1 files differ)
ww3_tp2.17/./work_mc                     (1 files differ)
ww3_tp2.17/./work_ice                     (1 files differ)
ww3_tp2.17/./work_a                     (1 files differ)
ww3_tp2.17/./work_mc1                     (1 files differ)
ww3_tp2.17/./work_mb                     (1 files differ)
ww3_tp2.17/./work_deep_restart                     (1 files differ)
ww3_ufs1.1/./work_d                     (1 files differ)
ww3_ufs1.1/./work_c                     (1 files differ)
ww3_ufs1.1/./work_c_nth                     (1 files differ)
ww3_ufs1.1/./work_c_npl                     (1 files differ)
ww3_ufs1.2/./work_b                     (4 files differ)
ww3_ufs1.2/./work_c                     (3 files differ)
ww3_ufs1.2/./work_a                     (4 files differ)
ww3_ufs1.2/./work_l                     (1 files differ)

• Bugfix for spurious wave energy along coastlines of nested SMC grid models
  No change in regression test result.
• Removes extra comma on line 1355 of w3iogrmd.F90 to fix a bug when using the WCOR switch
  No change in regression test result.
• Changes in switches for regtest ww3_tp2.17 case deep to reflect desired operational switches in RWPS. Same switches are used in file model/bin/switch_NWS_rwps
  Changes in regression test results:

ww3_tp2.17/./work_deep                     (48 files differ)
ww3_tp2.17/./work_deepB                     (48 files differ)
ww3_tp2.17/./work_deep_restart                     (39 files differ)

• ST6 source term updated for coupled simulation. Memory leak addressed and build system updated
  Changes to mod_defs.* and ww3_grid*.out are expected as part of this PR. In addition,
  out_grid changes for the following:

ww3_ts1/work_ST6
tww3_ts2/work_ST6_PR1
ww3_ts2/work_ST6_PR3_UQ
tww3_ts2/work_ST6_PR2_UNO
ww3_ts2/work_ST6_PR2_UQ
ww3_ts2/work_ST6_PR3_UNO

results changes in:

ww3_ts1; test run: ./work_ST6                   ww3.196806.nc differ
ww3_tp2.15; test run: ./work_ST6FLX5      49 files differ 

• Add double precision option to ounf namelist.
  Changes in regression test results:

mww3_test_09/./work_MPI_ASCII                     (17 files differ)
mww3_test_09/./work_MPI                     (15 files differ)
ww3_tnc1/./work                     (1 files differ)
ww3_ts1/./work_T702                     (1 files differ)
ww3_ts1/./work_ST4_CAP                     (1 files differ)
ww3_ts1/./work_ST4_T700                     (1 files differ)
ww3_ts1/./work_T713GQM                     (1 files differ)
ww3_ts1/./work_Romero                     (1 files differ)
ww3_ts1/./work_ST6_CAP                     (1 files differ)
ww3_ts1/./work_ST4_T500                     (1 files differ)
ww3_ts1/./work_T707GQM                     (1 files differ)
ww3_ts1/./work_T701                     (1 files differ)

• Fix convergence stall in IMPTOTAL solver with JGS_TERMINATE_DIFFERENCE=T.
  Changes in regression test results:

ww3_tp2.17/./work_c                     (8 files differ)
ww3_tp2.17/./work_mc                     (6 files differ)
ww3_tp2.17/./work_mc1                     (6 files differ)
ww3_tp2.19/./work_1A_a                     (9 files differ)
ww3_tp2.19/./work_1C_a                     (9 files differ)
ww3_tp2.19/./work_1B_a                     (9 files differ)
ww3_tp2.21/./work_b                     (6 files differ)
ww3_tp2.21/./work_b_metis                     (6 files differ)
ww3_tp2.21/./work_mb                     (7 files differ)
ww3_tp2.6/./work_pdlib                     (11 files differ)

• Added a test case to ww3_ufs1.1 that includes the -N flag and adjusted all nml files so the output matches that of work_unstr_a.
  One new regression test case is added:
  ww3_ufs1.1/./work_unstr_a_nml (directory not found)
  No change in regression test result.

• Fix additional compiler warnings and remarks.
  No change in regression test result.

Issue(s) addressed

Commit Message

Sync develop as of 8-7-2026 to dev/ufs-weather-model

Check list

• Branch is up to date with the authoritative repository (NOAA-EMC) develop branch.
• Checked the checklist for a developer submitting to develop.
• If a version number update is required, checked the updating version number checklist.
• If a new feature was added, a regression test for testing the new feature is added.

Testing

• How were these changes tested? Matrix comparison to dev/ufs-weather-model
• Are the changes covered by regression tests? (If not, why? Do new tests need to be added?) Yes
• Have the matrix regression tests been run (if yes, please note HPC and compiler)? Ursa Intel
• Please indicate the expected changes in the regression test output, (Note the list of known non-identical tests.)
• Please provide the summary output of matrix.comp (matrix.Diff.txt, matrixCompFull.txt and matrixCompSummary.txt):

matrixCompFull.txt
matrixCompSummary.txt

[mingchen-NOAA]

UFSWM RT test Passed on Ursa.
New input: /scratch4/NCEPDEV/marine/Ming.Chen/ww3/ursa/syncdevelop2ufswm20260805/WW3_input_data_20250807
UFS RT test: /scratch4/NCEPDEV/marine/Ming.Chen/ww3/ursa/syncdevelop2ufswm20260805/ufswm/tests

[gspetro-NOAA]

@mingchen-NOAA @JessicaMeixner-NOAA I see some failing CI on here--is that expected, or does something in this PR need fixing?

[JessicaMeixner-NOAA]

@mingchen-NOAA @JessicaMeixner-NOAA I see some failing CI on here--is that expected, or does something in this PR need fixing?

Nothing is wrong with this PR. The CI hasn't been working in the develop branch for a while, but we have not had the time to attempt to see what is wrong and fix it.

[gspetro-NOAA]

Testing on ufs-community/ufs-weather-model#3318 completed successfully. This PR can be merged.