I am a new owner and observer. I find the haptic rain monitor/sensor to be extremely off. I’ve suspected it for some time, now I’ve confirmed it. I have a CoCoRaHS rain gauge to compare to - last night the Tempest reports we got .38", we actually got .87". That’s off by over half. It’s said it somehow calibrates itself eventually, how long does this take? The station has been installed for a month now. We’ve had two heavy rainfalls, some light between (or so I think - they may have been heavier here, happened when I was at work).
Last night’s rain was torrential, during a thunderstorm.