feature #63 hurricane_matthew_docs

[briannen]

Doc only changes, review at https://i-wrf--65.org.readthedocs.build/en/65/Users_Guide/usecases.html

Pull Request Testing

• Describe testing already performed for these changes:
  

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

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

• Do these changes include sufficient testing updates? [Yes or No]

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

• Please complete this pull request review by [Fill in date].
  

Pull Request Checklist

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• Complete the PR definition above.
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  Select: Reviewer(s)
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[jaredalee]

Looks good. Thanks, Brianne.