[wxqc] Re: Sea Level Pressure

[John Webb]

The Davis Vantage Pro II reports using sea level pressure reduction 
algorithm (elevation AND temperature corrections). I have noticed that QC 
takes this and then corrects it again for temperature. This causes 
barometer QC for Vantage stations to fluctuate significantly, especially 
after cold fronts. Can this be programmed in QC? Fact is that Davis Vantage 
stations do not report altimeter pressure.

John Webb

At 12:00 PM 8/19/2005, you wrote:
>Don,
>
>CWOP "sea level pressures" are in fact the altimeter sea level
>reduction, which is a function of elevation.  "Sea level pressure" as
>defined here use the NWS sea level pressure reduction algorithm, which
>is a function of both elevation and temperature.
>
>On Thu, 18 Aug 2005, Don Palmer wrote:
>
> > I just recently noticed that my sea level readings are listed under 
> "Altimeter" beneath the heading of "Pressure In", where they list 
> Pressure In, Sea Level Pressure and Altimeter.  What's with that?
> >
> > don
> > CW2327