Barometric Pressure off (corrected once CL system is deployed)

[moeythomas]

@peter

I’m not sure I’m following. Sorry!

The Air module measures absolute pressure. This is what is sent to the WF servers and what you can download from the API. This needs to be corrected for the station elevation, however, to get sea level pressure, and it is sea level pressure that is displayed in the WF app. So changing your elevation in the app will change the reported sea level pressure.

Am I missing something?

You are missing something - it’s categorically wrong. I’m reading the Davis manual right now…

When adjusting my elevation on the WeatherFlow app, I have to put it minus 40ft to get a figure that matches my Davis. That bit is clearly wrong!
On the Davis, you input your correct elevation, then adjust your console/stations pressure to the nearest correct observation. Once done, you get a calculated sea level pressure from it.

WeatherFlow are doing it the wrong way around. Their elevation adjustment is changing the sea level pressure, it should be changing the reading at the module, which will then calculate the sea level pressure.

It speaks for itself, surely? If I am having to put in an elevation of 40ft below sea level, then something is clearly wrong, isn’t it?