I don’t think that it is a vibration issue in my situation, either. It is the combination of Rain Check and the sensor reports being far apart.
My Sky is mounted on a heavy-duty satellite dish mount onto the gable end of our house. The pole extends less than 3 feet up above the peak of the roof.
Nevertheless, I had so much problem with Rain Check undercutting the rain amounts that I had to turn off Rain Check several months ago.
The Rain Check would often report totals significantly less with both the official amount for our city (Weather Service) AND other reporting stations that were geographically close (a mile or so) from my house.
I’ve given up paying any attention to the rain amounts from my Weatherflow Sky and I’m not going to go to the expense of purchasing a different rain gauge just to calibrate something in one location and then get someone to have it moved back to the permanent location (I cannot go onto roofs or climb ladders). So for me, the need to get the Sky unit unmounted from the permanent mount, move it to a temporary mount, install a new gauge nearby, send in reports, have Weatherflow do something, unmount the Sky unit from the temporary mount, have it moved back to the permanent location, move the new gauge, etc. – I can’t do all of that.
These things were supposedly calibrated before shipping – and now we hear that to get them to work accurately (maybe) each one needs a separate calibration after shipping. This sounds like either a major quality control issue or a design issue and is disappointing. I"ve had my Weatherflow Sky (and Air) installed for just under 12 months. Most of the sensors seem to be working great – just not the rain sensor.