Hi Mattheo,
please be a little bit patient, release 1.12 of weather radio will contain this option. If you know what you are doing, you could check out the branch weatherradio-v_1.12 from my indi-3rdparty clone github.com/sterne-jaeger/indi-3rdparty.git

The INDI driver is ready, the integration into the web page is missing.

With this upcoming release, I added the option for rain drop detectors, i.e. as soon as first rain drops are recognized, the weather status changes to ALARM so that for example the observatory controller could close the roof.