SLC is currently showing 1011.4 hPa at an elevation of 1286 metres.
My current pressure is 1008.5 hPa at an elevation of 2525 metres.
My station is 1239 metres higher in elevation and should therefore be lower in pressure than KSLC.
My air pressure data looks accurate to me.
The altitude of the station is uninteresting all weather stations (and airports) measure at sea level.
Please adjust your barometer reading to sea level
This morning, after sending data to AWEKAS for more than two years, I received notice from them that they had turned off my barometric pressure reading because it is not set to sea level.
. . . .
I am confused. Is there a setting in WeatherCat that allows one to adjust the pressure to sea level? And if so, should I use it?
Just talked to Davis tech support. If you enter your elevation in the Davis setup screen, the pressure is adjusted for altitude and gives you the "altimeter setting" reading. If you do not enter an elevation, the pressure is not adjusted for altitude and gives you the "sea level" reading. According to Davis, both methods are used and you pick the one you want.
This table might help check the accuracy of the Pressure reading you are seeing. It might also be interesting to look at the text below the table to see the variables used in the computations.Altitude to Pressure Conversion Table (https://www.sensorsone.com/altitude-pressure-units-conversion/)
AWEKAS
AWEKAS apparently wants the raw pressure reading, not adjusted for altitude. Since no other weather service wants the pressure reported this way, unless WeatherCat has some way to do an unadjusted pressure calculation, it appears my best option is to stop reporting data to AWEKAS, so I am considering taking my toys and going home.
This morning, after sending data to AWEKAS for more than two years, I received notice from them that they had turned off my barometric pressure reading because it is not set to sea level.
The altitude of the station is uninteresting all weather stations (and airports) measure at sea level.
Please adjust your barometer reading to sea level
AWEKAS
AWEKAS apparently wants the raw pressure reading, not adjusted for altitude. Since no other weather service wants the pressure reported this way, unless WeatherCat has some way to do an unadjusted pressure calculation, it appears my best option is to stop reporting data to AWEKAS, so I am considering taking my toys and going home.
In addition, when I compare my pressure readings to the SLC Airport, I am pretty much where I should be given the altitude difference between here and there and I know they adjust for sea level.
I just checked the AWEKAS site and I see weather-stations in Switzerland at 2,800m (?9,100 ft) reporting 1014hPa. A nearby station at 215m (700ft) is reporting practically the same value so they MUST be using the same reference altitude (= sea level).
Because the Davis formula for correcting air pressure for altitude does not precisely match the NOAA formula, entering my altitude into the console does not quite allow my pressure to align with the SLC Airport.
In addition to the altitude adjustment, I simply calibrated my console slightly to match the Metar data from the airport. I prefer to calibrate the console because i don't like seeing one number on the console and a different number in WeatherCat. I'll watch this over the next few days and see how it tracks. I have been under reporting my pressure by about 0.26 inHg, which also explains why I have never been able to pass the CWOP quality control check for pressure.
Might even join AWEKAS!