Feature #3098 america

[JohnHalleyGotway]

Expected Differences

• Do these changes introduce new tools, command line arguments, or configuration file options? [No]
  
  If yes, please describe:
  

• Do these changes modify the structure of existing or add new output data types (e.g. statistic line types or NetCDF variables)? [No]
  
  If yes, please describe:
  

Pull Request Testing

• Describe testing already performed for these changes:
  
  None.

• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  

• Confirm all GHA tests run and no differences on flagged.

• Briefly review file name and content changes.

• Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [Yes]

• Include minor updates to Appendix B.

• Do these changes include sufficient testing updates? [Yes]
  None needed.

• Will this PR result in changes to the MET test suite? [No]
  
  If yes, describe the new output and/or changes to the existing output:
  

• Will this PR result in changes to existing METplus Use Cases? [Probably Not]
  
  If yes, create a new Update Truth METplus issue to describe them.
  Any METplus use cases that reference GMC.poly will be affected. Those will need to be changed to GAC.poly instead.

• Do these changes introduce new SonarQube findings? [No]
  
  If yes, please describe:

• Please complete this pull request review by [Monday March 10, 2025].
  

Pull Request Checklist

See the METplus Workflow for details.

• Review the source issue metadata (required labels, projects, and milestone).
• Complete the PR definition above.
• Ensure the PR title matches the feature or bugfix branch name.
• Define the PR metadata, as permissions allow.
  Select: Reviewer(s) and Development issue
  Select: Milestone as the version that will include these changes
  Select: Coordinated METplus-X.Y Support project for bugfix releases or MET-X.Y.Z Development project for official releases
• After submitting the PR, select the ⚙️ icon in the Development section of the right hand sidebar. Search for the issue that this PR will close and select it, if it is not already selected.
• After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
• Close the linked issue and delete your feature or bugfix branch from GitHub.