WeatherFlow Tempest has a lightning detector. Since station arrived, Station Master has not been able to check whether the detector actually works. But today, there was a thunderstorm in Turku at the time Station master was there, too. Quick check showed that the lightnings were detected in Nauvo.
Some settings regarding lightning reporting were off, but now they are fixed. On Station’s home page, you’ll now see the time and distance of a last detected lightning, and count of lightnings last 3 hours and 1 hour.