6.9.0

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feat(prp): support coordinate transformations

enhancement

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 1901

#1901 In MODFLOW-ORG/modflow6;

· wpbonelli opened on Jun 26, 2024

feat(prt): support model coupling via particle exchange

enhancement

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2751

#2751 In MODFLOW-ORG/modflow6;

· wpbonelli opened on Apr 2, 2026

feat(prt): support backward tracking

enhancement

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2790

#2790 In MODFLOW-ORG/modflow6;

· wpbonelli opened on Apr 27, 2026

feat(spec): add command to show DFN specification

enhancement

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2782

#2782 In MODFLOW-ORG/modflow6;

· wpbonelli opened on Apr 20, 2026

Array-based input in advanced packages

enhancement

Status: Open.

#2041 In MODFLOW-ORG/modflow6;

· wpbonelli opened on Oct 19, 2024

feat: tolerate unknown options

enhancement

optionMF6 IO relatedMF6 IO related

questionNeeds someone's attentionNeeds someone's attention

Status: Open (in progress).

MODFLOW-ORG/modflow6number 2809

#2809 In MODFLOW-ORG/modflow6;

· wpbonelli opened on May 21, 2026

feat: tolerate empty traditional stress packages

enhancement

questionNeeds someone's attentionNeeds someone's attention

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2856

#2856 In MODFLOW-ORG/modflow6;

· wpbonelli opened on Jun 20, 2026

feat: tolerate boundary conditions on inactive cells

enhancement

questionNeeds someone's attentionNeeds someone's attention

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2863

#2863 In MODFLOW-ORG/modflow6;

· wpbonelli opened on Jun 25, 2026

doc(api): add initial modflow6 api document

Status: Open (in progress).

MODFLOW-ORG/modflow6number 2837

#2837 In MODFLOW-ORG/modflow6;

· jdhughes-dev opened on Jun 12, 2026

Nightly example releases

ciContinuous integrationContinuous integration

examplesMODFLOW 6 examplesMODFLOW 6 examples

nightly buildNightly development buildNightly development build

questionNeeds someone's attentionNeeds someone's attention

releaseRelease- or distribution-related changesRelease- or distribution-related changes

Status: Open.

#2245 In MODFLOW-ORG/modflow6;

· wpbonelli opened on Mar 12, 2025

feat(idm): integrate MAW package

Status: Open (in progress).

MODFLOW-ORG/modflow6number 2748

#2748 In MODFLOW-ORG/modflow6;

· mjreno opened on Mar 31, 2026

feat(idm): integrate LAK package

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2771

#2771 In MODFLOW-ORG/modflow6;

· mjreno opened on Apr 15, 2026

feat(idm): integrate UZF package

Status: Open (in progress).

MODFLOW-ORG/modflow6number 2786

#2786 In MODFLOW-ORG/modflow6;

· mjreno opened on Apr 22, 2026

feat(idm): integrate OBS utility package

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2553

#2553 In MODFLOW-ORG/modflow6;

· mjreno opened on Sep 30, 2025

feat(idm): integrate GNC package

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2442

#2442 In MODFLOW-ORG/modflow6;

· mjreno opened on Aug 5, 2025

feat(idm): integrate MOVER packages

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2400

#2400 In MODFLOW-ORG/modflow6;

· mjreno opened on Jul 17, 2025

feat(netcdf): add GeoTransform/spatial_ref and z elevation coordinates

Status: Open (in progress).

MODFLOW-ORG/modflow6number 2883

#2883 In MODFLOW-ORG/modflow6;

· mjreno opened on Jul 8, 2026

feat(abc): process-based approach for stream temperature modeling (atmospheric boundary condition utility)

enhancement

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2235

#2235 In MODFLOW-ORG/modflow6;

· emorway-usgs opened on Mar 5, 2025

perf(uzf): allocate unsaturated zone work arrays once and refactor the package

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2909

#2909 In MODFLOW-ORG/modflow6;

· jdhughes-dev opened on Aug 7, 2026

UZF wave-creation tolerances are scaled as though the model length unit were feet

bug

Status: Open.

#2910 In MODFLOW-ORG/modflow6;

· jdhughes-dev opened on Aug 7, 2026

Stress-period-varying IMS linear settings (LINEAR_PERIODDATA), serial and parallel

Status: Open (in progress).

MODFLOW-ORG/modflow6number 2894

#2894 In MODFLOW-ORG/modflow6;

· jdhughes-dev opened on Jul 18, 2026

feat(maw): activate and deactivate individual well connections

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2914

#2914 In MODFLOW-ORG/modflow6;

· jdhughes-dev opened on Aug 10, 2026

GWT: gwfsatold omits the porosity when reconstructing the previous saturation

Status: Open.

#2917 In MODFLOW-ORG/modflow6;

· jdhughes-dev opened on Aug 11, 2026

feat(gwt): hold solute back when a cell drains

Status: Draft (not ready).

MODFLOW-ORG/modflow6number 2918

#2918 In MODFLOW-ORG/modflow6;

· jdhughes-dev opened on Aug 12, 2026

GWT: solute in water retained against drainage is not carried across time steps when specific yield is less than porosity

Status: Open.

#2921 In MODFLOW-ORG/modflow6;

· jdhughes-dev opened on Aug 12, 2026