In an effort to kickstart this development effort, I'm writing out this milestone.

TODO: Sadly, I don't have time to do this completely right now, but I will get back to this in a week or so. I'm doing this now to let everyone know that we should start moving forward!

For now, I think we should consider @jthielen's discussion thread WRF in Python Feature Comparison an excellent starting point. Here are our first priorities:

1. Identify the first features to implement. Any feature on the list in the discussion thread that is not implemented in MetPy should get implemented in xWRF. We will reassess if certain features should move to MetPy later in the project.
2. Create issues for the features you are working on or plan on working on in this repository or (if you have time) for other features that need to be worked on even if you don't have time yourself. As much detail describing what needs to be done should be written in the issue.
3. Use GitHub to ping collaborators directly on issues.
4. Start creating draft PRs to address the created issues. (That is, don't create any new PRs without an issue.)
5. Make sure you add tests for each new feature that you are creating as part of the feature's PR!
6. When you think a PR is ready to be reviewed, convert the draft PR to a regular PR and select 2 reviewers. (We can automate this process later.)

As the project evolves and new features are added, we will need to address CI testing, writing documentation and providing examples.