diff --git a/.github/jobs/configure_sonarqube.sh b/.github/jobs/configure_sonarqube.sh
new file mode 100755
index 0000000000..c60e73485b
--- /dev/null
+++ b/.github/jobs/configure_sonarqube.sh
@@ -0,0 +1,65 @@
+#!/bin/bash
+
+# Constants
+SONAR_PROPERTIES_DIR=internal/scripts/sonarqube
+SONAR_PROPERTIES=sonar-project.properties
+
+# Check that this is being run from the top-level METplus directory
+if [ ! -e $SONAR_PROPERTIES_DIR/$SONAR_PROPERTIES ]; then
+  echo "ERROR: ${0} -> must be run from the top-level METplus directory"
+  exit 1
+fi
+
+# Check required environment variables
+if [ -z ${SOURCE_BRANCH+x} ]; then
+  echo "ERROR: ${0} -> \$SOURCE_BRANCH not defined!"
+  exit 1
+fi
+if [ -z ${WD_REFERENCE_BRANCH+x} ]; then
+  echo "ERROR: ${0} -> \$WD_REFERENCE_BRANCH not defined!"
+  exit 1
+fi
+if [ -z ${SONAR_HOST_URL+x} ]; then
+  echo "ERROR: ${0} -> \$SONAR_HOST_URL not defined!"
+  exit 1
+fi
+if [ -z ${SONAR_TOKEN+x} ]; then
+  echo "ERROR: ${0} -> \$SONAR_TOKEN not defined!"
+  exit 1
+fi
+
+# Define the version string
+SONAR_PROJECT_VERSION=$(cat metplus/VERSION)
+
+#
+# Define the $SONAR_REFERENCE_BRANCH as the
+#   - Target of any requests
+#   - Manual setting for workflow dispatch
+#   - Source branch for any pushes (e.g. develop)
+#
+if [ "$GITHUB_EVENT_NAME" == "pull_request" ]; then
+  export SONAR_REFERENCE_BRANCH=$GITHUB_BASE_REF
+elif [ "$GITHUB_EVENT_NAME" == "workflow_dispatch" ]; then
+  export SONAR_REFERENCE_BRANCH=$WD_REFERENCE_BRANCH
+else
+  export SONAR_REFERENCE_BRANCH=$SOURCE_BRANCH
+fi
+
+# Configure the sonar-project.properties
+[ -e $SONAR_PROPERTIES ] && rm $SONAR_PROPERTIES
+sed -e "s|SONAR_PROJECT_KEY|METplus-GHA|" \
+    -e "s|SONAR_PROJECT_NAME|METplus GHA|" \
+    -e "s|SONAR_PROJECT_VERSION|$SONAR_PROJECT_VERSION|" \
+    -e "s|SONAR_HOST_URL|$SONAR_HOST_URL|" \
+    -e "s|SONAR_TOKEN|$SONAR_TOKEN|" \
+    -e "s|SONAR_BRANCH_NAME|$SOURCE_BRANCH|" \
+    $SONAR_PROPERTIES_DIR/$SONAR_PROPERTIES > $SONAR_PROPERTIES
+
+# Define new code when the source and reference branches differ
+if [ "$SOURCE_BRANCH" != "$SONAR_REFERENCE_BRANCH" ]; then
+  echo "sonar.newCode.referenceBranch=${SONAR_REFERENCE_BRANCH}" >> $SONAR_PROPERTIES
+fi
+
+echo "Contents of the $SONAR_PROPERTIES file:"
+cat $SONAR_PROPERTIES
+
diff --git a/.github/jobs/get_use_cases_to_run.sh b/.github/jobs/get_use_cases_to_run.sh
index d937f1f7a8..a70ec08ac0 100755
--- a/.github/jobs/get_use_cases_to_run.sh
+++ b/.github/jobs/get_use_cases_to_run.sh
@@ -18,10 +18,10 @@ if [ "$run_use_cases" == "true" ]; then
   # if only running new use cases, add to filter criteria
   if [ "$run_all_use_cases" == "false" ]; then
     echo "Only run use cases that are marked to run every time (run = true)"
-    matrix=$(jq '[.[] | select(.run == true) | (.category + ":" + .index_list)]' $use_case_groups_filepath)
+    matrix=$(jq '[.[] | select(.run == true) | select(.disabled != true) | (.category + ":" + .index_list)]' $use_case_groups_filepath)
   else
     echo Add all available use cases
-    matrix=$(jq '[.[] | (.category + ":" + .index_list)]' $use_case_groups_filepath)
+    matrix=$(jq '[.[] | select(.disabled != true) | (.category + ":" + .index_list)]' $use_case_groups_filepath)
   fi
 
 fi
diff --git a/.github/parm/use_case_groups.json b/.github/parm/use_case_groups.json
index 6963d1127e..ea51000c83 100644
--- a/.github/parm/use_case_groups.json
+++ b/.github/parm/use_case_groups.json
@@ -267,6 +267,7 @@
   {
     "category": "short_range",
     "index_list": "14",
+    "disabled": true,
     "run": false
   },
   {
diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index dda54835fa..342abeb992 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -11,6 +11,9 @@
 - [ ] Will this PR result in changes to the test suite? **[Yes or No]**</br>
 If **yes**, describe the new output and/or changes to the existing output:</br>
 
+- [ ] Do these changes introduce new SonarQube findings? **[Yes or No]**</br>
+If **yes**, please describe:
+
 - [ ] Please complete this pull request review by **[Fill in date]**.</br>
 
 ## Pull Request Checklist ##
diff --git a/.github/workflows/sonarqube.yml b/.github/workflows/sonarqube.yml
new file mode 100644
index 0000000000..b204179029
--- /dev/null
+++ b/.github/workflows/sonarqube.yml
@@ -0,0 +1,82 @@
+name: SonarQube Scan
+
+# Run SonarQube for Pull Requests and changes to the develop and main_vX.Y branches
+
+on:
+
+  # Trigger analysis for pushes to develop and main_vX.Y branches
+  push:
+    branches:
+      - develop
+      - 'main_v**'
+    paths-ignore:
+      - 'docs/**'
+      - '.github/pull_request_template.md'
+      - '.github/ISSUE_TEMPLATE/**'
+      - '.github/labels/**'
+      - 'build_components/**'
+      - 'manage_externals/**'
+      - '**/README.md'
+      - '**/LICENSE.md'
+
+  # Trigger analysis for pull requests to develop and main_vX.Y branches
+  pull_request:
+    types: [opened, synchronize, reopened]
+    branches:
+      - develop
+      - 'main_v**'
+    paths-ignore:
+      - 'docs/**'
+      - '.github/pull_request_template.md'
+      - '.github/ISSUE_TEMPLATE/**'
+      - '.github/labels/**'
+      - 'build_components/**'
+      - 'manage_externals/**'
+      - '**/README.md'
+      - '**/LICENSE.md'
+
+  workflow_dispatch:
+    inputs:
+      reference_branch:
+        description: 'Reference Branch'
+        default: develop
+        type: string
+
+jobs:
+  sonarqube:
+    name: SonarQube Scan
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - uses: actions/checkout@v4
+      with:
+        # Disable shallow clones for better analysis
+        fetch-depth: 0
+
+    - name: Get branch name
+      id: get_branch_name
+      run: echo branch_name=${GITHUB_REF#refs/heads/} >> $GITHUB_OUTPUT
+
+    - name: Configure SonarQube
+      run: .github/jobs/configure_sonarqube.sh
+      env:
+        SOURCE_BRANCH: ${{ steps.get_branch_name.outputs.branch_name }}
+        WD_REFERENCE_BRANCH: ${{ github.event.inputs.reference_branch }}
+        SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+        SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+
+    - name: SonarQube Scan
+      uses: sonarsource/sonarqube-scan-action@master
+      env:
+        SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+        SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+
+    - name: SonarQube Quality Gate check
+      id: sonarqube-quality-gate-check
+      uses: sonarsource/sonarqube-quality-gate-action@master
+      # Force to fail step after specific time.
+      timeout-minutes: 5
+      env:
+       SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+       SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
diff --git a/docs/Contributors_Guide/continuous_integration.rst b/docs/Contributors_Guide/continuous_integration.rst
index b4283f9a97..f98fbb14f2 100644
--- a/docs/Contributors_Guide/continuous_integration.rst
+++ b/docs/Contributors_Guide/continuous_integration.rst
@@ -1191,6 +1191,31 @@ to run. Example::
 The above example will run data_assimilation 0, 1, 2, and 4 in one
 job, then data_assimilation 3 in another job.
 
+.. _cg-ci-disable_use_case:
+
+Disabling Use Cases
+"""""""""""""""""""
+
+Sometimes use cases should not run in the automated test suite.
+For example, changes to another repository may break a use case and prevent it
+from running successfully until a fix can be applied.
+In the meantime, to prevent the use case(s) from failing in the automated tests,
+a use case group can be disabled by adding *"disabled": true* in
+**use_case_groups.json**::
+
+      {
+        "category": "short_range",
+        "index_list": "14",
+        "disabled": true,
+        "run": true
+      },
+
+It is recommended to add this key/value pair before the *run* key/value to avoid
+having to add a comma to the end of the *run* value.
+
+If the *disabled* value is set to *true*, then the use case group will not run
+even if the *run* attribute is set to *true*.
+
 Run Use Cases
 ^^^^^^^^^^^^^
 
diff --git a/docs/Release_Guide/release_steps/update_release_notes_development.rst b/docs/Release_Guide/release_steps/update_release_notes_development.rst
index 1baf3ef0f6..a49edc7f92 100644
--- a/docs/Release_Guide/release_steps/update_release_notes_development.rst
+++ b/docs/Release_Guide/release_steps/update_release_notes_development.rst
@@ -26,8 +26,16 @@ release. Open the following URL in a browser:
 * If you are creating a beta1 release, remove the previous version's release
   notes, i.e. for 3.0.0-beta1, remove all 2.Y.Z notes and start a 3.0.0
   section with the format "Version X.Y.Z release notes (YYYYMMDD)".
-    
+
 * If you are creating a betaX release, add a new betaX section above the betaX-1
   release.
 
+* For the METplus repository, update the **development timeline**.
+
+  * If you are creating a beta1 release, add development timeline
+    information with approximate dates for planned development cycles.
+
+  * For other development releaes, edit the actual release dates and planned
+    release dates for future development cycles, as needed.
+
 * Commit changes and push to GitHub.
diff --git a/docs/Release_Guide/release_steps/update_release_notes_official.rst b/docs/Release_Guide/release_steps/update_release_notes_official.rst
index d7509609a8..5da7a676db 100644
--- a/docs/Release_Guide/release_steps/update_release_notes_official.rst
+++ b/docs/Release_Guide/release_steps/update_release_notes_official.rst
@@ -20,10 +20,13 @@ release. Open the following URL in a browser:
   (e.g. Enhancements, Bugfixes, Documentation, etc.) and modifying
   GitHub issue titles for consistency. The release notes should match
   the GitHub issue titles, when possible.
-  
+
 * Use your best judgement to apply bold formatting for any major or important changes.
 
 * When creating the official release, combine the beta release sections
   into one section (i.e. "Version X.Y.Z release notes (YYYYMMDD)").
-  
+
+* For the METplus repository, remove the **development timeline** information
+  prior to creating the official release.
+
 * Commit changes and push to GitHub.
diff --git a/docs/Users_Guide/release-notes.rst b/docs/Users_Guide/release-notes.rst
index 0bd253b36d..5d33b75b0b 100644
--- a/docs/Users_Guide/release-notes.rst
+++ b/docs/Users_Guide/release-notes.rst
@@ -4,10 +4,23 @@
 METplus Release Information
 ***************************
 
-Users can view the :ref:`releaseTypes` section of
-the Release Guide for descriptions of the development releases (including
-beta releases and release candidates), official releases, and bugfix
-releases for the METplus Components.
+Users can view the :ref:`releaseTypes` section of the Release Guide
+for descriptions of the development releases (including beta releases
+and release candidates), official releases, and bugfix releases for
+the METplus Components.
+
+.. _development_timeline:
+
+The **development timeline** for the METplus 6.0.0 Coordinated Release
+is broken down into the following development cycles for each component:
+
+1. **Beta1** releases for the METplus components occurred around 2023-09-15.
+2. **Beta2** releases for the METplus components occurred around 2023-11-14.
+3. **Beta3** releases for the METplus components occurred around 2024-02-08.
+4. **Beta4** releases are tentatively scheduled for 2024-04-17.
+5. **Beta5** releases are tentatively scheduled for 2024-06-26.
+6. **Release Candidate 1** releases have not yet been scheduled.
+7. **Official Release** releases have not yet been scheduled.
 
 .. _components-release-notes:
 
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4ae7110210..0628125f64 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 sphinx==5.3.0
-pillow==10.2.0
+pillow==10.3.0
 sphinx-gallery==0.14.0
 sphinx-rtd-theme==1.3.0
 sphinx-design==0.3.0
diff --git a/internal/scripts/sonarqube/environment/development.seneca b/internal/scripts/sonarqube/development.seneca
similarity index 100%
rename from internal/scripts/sonarqube/environment/development.seneca
rename to internal/scripts/sonarqube/development.seneca
diff --git a/internal/scripts/sonarqube/environment/development.docker b/internal/scripts/sonarqube/environment/development.docker
deleted file mode 100644
index 62db756cc9..0000000000
--- a/internal/scripts/sonarqube/environment/development.docker
+++ /dev/null
@@ -1,10 +0,0 @@
-# Define the development environment for NCAR project machine seneca
-# Based on settings in /usr/local/src/met/README.snat
-
-# Top-level MET project directory
-MET_PROJ_DIR=`ls -1d /met/MET*`
-
-# SonarQube
-#export SONARQUBE_DIR=/d1/projects/SonarQube/
-#export SONARQUBE_WRAPPER_BIN=$SONARQUBE_DIR/build-wrapper-linux-x86
-#export SONARQUBE_SCANNER_BIN=$SONARQUBE_DIR/sonar-scanner-4.6.2.2472-linux/bin
diff --git a/internal/scripts/sonarqube/run_nightly.sh b/internal/scripts/sonarqube/run_nightly.sh
index 5e41979cc8..98bcf376b5 100755
--- a/internal/scripts/sonarqube/run_nightly.sh
+++ b/internal/scripts/sonarqube/run_nightly.sh
@@ -20,8 +20,7 @@
 #=======================================================================
 
 # Constants
-#EMAIL_LIST="johnhg@ucar.edu hsoh@ucar.edu jpresto@ucar.edu linden@ucar.edu mccabe@ucar.edu"
-EMAIL_LIST="johnhg@ucar.edu hsoh@ucar.edu mccabe@ucar.edu"
+EMAIL_LIST="johnhg@ucar.edu hsoh@ucar.edu jpresto@ucar.edu mccabe@ucar.edu"
 KEEP_DAYS=5
 
 function usage {
@@ -39,7 +38,7 @@ SCRIPT_DIR=`dirname $0`
 if [[ ${0:0:1} != "/" ]]; then SCRIPT_DIR=$(pwd)/${SCRIPT_DIR}; fi 
 
 # Define the development environment
-ENV_FILE=${SCRIPT_DIR}/environment/development.`hostname`
+ENV_FILE=${SCRIPT_DIR}/development.`hostname`
 if [[ ! -e ${ENV_FILE} ]]; then
   echo "$0: ERROR -> Development environment file missing: ${ENV_FILE}"
   exit 1
@@ -71,6 +70,4 @@ if [[ $? -ne 0 ]]; then
   exit 1
 fi
 
-# Convert SonarQube report from pdf to html
-
 exit 0
diff --git a/internal/scripts/sonarqube/run_sonarqube.sh b/internal/scripts/sonarqube/run_sonarqube.sh
index 4b856eab22..3a3669c37a 100755
--- a/internal/scripts/sonarqube/run_sonarqube.sh
+++ b/internal/scripts/sonarqube/run_sonarqube.sh
@@ -1,37 +1,48 @@
 #!/bin/bash
 #
-# Run SonarQube Source Code Analyzer on a specified revision of MET
+# Run SonarQube Source Code Analyzer for METplus
 #=======================================================================
 #
 # This run_sonarqube.sh script will check out the specified version
-# of MET and run the SonarQube Source Code Analyzer on it.  First,
+# of METplus and run the SonarQube Source Code Analyzer on it.  First,
 # go to the directory where you would like the SCA output written and
 # then run:
 #
 #    git clone https://github.com/dtcenter/METplus
-#    METplus/internal/scripts/sonarqube/run_sonarqube.sh name
+#    METplus/sonarqube/run_sonarqube.sh name
 #
 # Usage: run_sonarqube.sh name
-#    Test the specified branched version of MET:
+#    Test the specified branched version of METplus:
 #       run_sonarqube.sh {branch name}
-#    Test the specified tagged version of MET:
+#    Test the specified tagged version of METplus:
 #       run_sonarqube.sh {tag name}
 #
 #=======================================================================
 
 # Constants
-GIT_REPO="https://github.com/dtcenter/METplus"
+GIT_REPO_NAME=METplus
+GIT_REPO="https://github.com/dtcenter/${GIT_REPO_NAME}"
 
 function usage {
-        echo
-        echo "USAGE: $(basename $0) name"
-        echo "   where \"name\" specifies a branch, tag, or hash."
-        echo
+  echo
+  echo "USAGE: $(basename $0) name"
+  echo "   where \"name\" specifies a branch, tag, or hash."
+  echo
 }
 
 # Check for arguments
 if [[ $# -lt 1 ]]; then usage; exit; fi
 
+# Check that SONAR_TOKEN and SONAR_HOST_URL are defined
+if [ -z ${SONAR_TOKEN} ]; then
+  echo "ERROR: SONAR_TOKEN must be set"
+  exit 1
+fi
+if [ -z ${SONAR_HOST_URL} ]; then
+  echo "ERROR: SONAR_HOST_URL must be set"
+  exit 1
+fi
+
 # Check that SONARQUBE_WRAPPER_BIN is defined
 if [ -z ${SONARQUBE_WRAPPER_BIN} ]; then
   which build-wrapper-linux-x86-64 2> /dev/null
@@ -86,13 +97,12 @@ function run_command() {
   return ${STATUS}
 }
 
-
 # Store the full path to the scripts directory
 SCRIPT_DIR=`dirname $0`
 if [[ ${0:0:1} != "/" ]]; then SCRIPT_DIR=$(pwd)/${SCRIPT_DIR}; fi 
 
 # Clone repo into a sub-directory and checkout the requested version
-REPO_DIR="METplus-${1}"
+REPO_DIR="${GIT_REPO_NAME}-${1}"
 
 if [ -e ${REPO_DIR} ]; then
   run_command "rm -rf ${REPO_DIR}"
@@ -101,14 +111,21 @@ run_command "git clone ${GIT_REPO} ${REPO_DIR}"
 run_command "cd ${REPO_DIR}"
 run_command "git checkout ${1}"
 
+# Define the version string
+SONAR_PROJECT_VERSION=$(cat metplus/VERSION)
+
 SONAR_PROPERTIES=sonar-project.properties
 
-# Copy sonar-project.properties for Python code
+# Configure the sonar-project.properties
 [ -e $SONAR_PROPERTIES ] && rm $SONAR_PROPERTIES
-cp -p $SCRIPT_DIR/sonar-project.properties $SONAR_PROPERTIES
+sed -e "s|SONAR_PROJECT_KEY|METplus_NB|" \
+    -e "s|SONAR_PROJECT_NAME|METplus Nightly Build|" \
+    -e "s|SONAR_PROJECT_VERSION|$SONAR_PROJECT_VERSION|" \
+    -e "s|SONAR_HOST_URL|$SONAR_HOST_URL|" \
+    -e "s|SONAR_TOKEN|$SONAR_TOKEN|" \
+    -e "s|SONAR_BRANCH_NAME|${1}|" \
+    $SCRIPT_DIR/$SONAR_PROPERTIES > $SONAR_PROPERTIES
 
 # Run SonarQube scan for Python code
 run_command "${SONARQUBE_SCANNER_BIN}/sonar-scanner"
 
-# Run SonarQube report generator to make a PDF file
-#TODAY=`date +%Y%m%d`
diff --git a/internal/scripts/sonarqube/sonar-project.properties b/internal/scripts/sonarqube/sonar-project.properties
index 677c640bcf..d1ed593a85 100644
--- a/internal/scripts/sonarqube/sonar-project.properties
+++ b/internal/scripts/sonarqube/sonar-project.properties
@@ -1,17 +1,12 @@
-sonar.projectKey=org.sonarqube:METplus_NB
-sonar.projectName=METplus Nightly Build
-sonar.projectVersion=1.0
-
+# Project and source code settings
+sonar.projectKey=SONAR_PROJECT_KEY
+sonar.projectName=SONAR_PROJECT_NAME
+sonar.projectVersion=SONAR_PROJECT_VERSION
+sonar.branch.name=SONAR_BRANCH_NAME
 sonar.sources=docs,internal,manage_externals,metplus,parm,produtil,ush
-
-# The build-wrapper output dir
-
-# Encoding of the source files
+sonar.coverage.exclusions=internal/tests/**
 sonar.sourceEncoding=UTF-8
 
-#----- Default SonarQube server
-#sonar.host.url=http://localhost:9000
-sonar.host.url=http://mandan:9000
-
-sonar.login=met
-sonar.password=met@sonar.ucar
+# SonarQube server
+sonar.host.url=SONAR_HOST_URL
+sonar.token=SONAR_TOKEN