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Select Models and Click New.
Fill out the Details tabs with Connection with the Named Credential just created.
Select the Request tab and choose the Method URL and parameters used to make the callout. See Weather API Documentation for more information.
Select Response tab and click on Generate Schema. Paste a sample response body and click Merge.
Click Save.
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Now we are good to start building applications… You can now go ahead with creating your application with your data connected.
AppExchange Link: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N4V00000GZCsrUAH