A suggestion for improvement

[Grandpa-G]

Maybe this isn't timely enough, but have you considered running a background process that reads all the airport METAR data and put it into a database. Then when the metar-v4 and wipes-v4 scripts run, they only need to access the db, not re-query every station.

There may be some timing such that you want more current data which would preclude this approach.

As an alternative, you might query as you do now but just do it one time in the steps and then have the other processes reference the first data via a db or other means.

Just a suggestion.