Not sure what platform you’re on, but I created a Shortcut on iOS/iPadOS to do this since the app is lacking a ‘favorite’ option.
I have a ‘Choose from Menu’ action that allows me to select from about 20 Tempest locations that I’ve set up URL links to. Click here to import the Shortcut example and customize how you like. I only left a few options in this draft version, but you can always add additional ones.
I also have the Shortcuts widget showing so I can quickly click the Shortcut and choose a location; optionally, you could add the Shortcut directly to your home screen.