I subscribe to CARROT so I can have my weather station data when home (or within 2 miles, I believe) and then it switches to current location using DarkSky. This also allows me to get my station data on Apple watch too.
Tempest app only provides your station data and a local forecast.
I also posted an example for a Tempest shortcut using the Shortcuts app. Not exactly what I think you’re looking for, but if there are frequent places you travel to, it can be helpful to generate the shortcut with nearby Tempest locations so you can quickly check conditions before leaving, on the way or just for interest.
iOS and iPadOS Shortcut for Tempest locations