[wxqc] Looking for help with Station - Odd shift in analysis

Ted Lum gladstonefamily73.net at tedlum.com
Wed Feb 17 15:12:57 CST 2016


The graphs are what they are in terms of date/time, but the default 
analysis period is 28 days. You can select a different period from the 
links at top of the page, or by specifying a specific number in the url.

On 2/17/2016 4:04 PM, Chris Miller wrote:
> Ok.  I have set the pressure on the PEET station to 23.46 mb over my 
> local surface pressure.  I have let the station run for a while and 
> cross checked the device used to get the local pressure to the station 
> AV065 and CYYB and any measurement error corrected for.  I discovered 
> that WUHU, when set to QNH pressure to CWOP with the altitude of the 
> sensor set to 650 feet (643 feet plus sensor height), that there is a 
> correction that gets applied to the sent data that is not visible on 
> the display locally in the software. It appears that it has a 
> temperature value in the math, if I read the WUHU news group 
> correctly.  I switched back to weather display with no correction 
> value in the software field and no altitude set in the software and so 
> far the data seems to match what is reported to CWOP.
> I have let the data run for a few days and my setting tracks the 
> output of AV065, CYYB, AR943 and CYWA with the expected stagger due to 
> weather pushing through.  The models for those stations show them to 
> be on, yet my model still shows me as being 4 to 6 mb low.
> Is there anything else that could be coming from the data supplied 
> that will skew the model so high?
> Also, is there a long delay, 3 to 6 months for example, before the 
> model would return to track the station after a burst of bad data?
> (I cropped down the email as it was getting a little long.)
> My station, model and nearest neighbours
> http://weather.gladstonefamily.net/qchart/AU770?date=20160217&addnl=AV065&addnl=CYYB&addnl=CYWA&addnl=AR943&Add+to+charts=Add+to+charts&.cgifields=addnl
> CYYB, its model and same stations
> http://weather.gladstonefamily.net/qchart/CYYB?date=20160217&addnl=AV065&addnl=AU770&addnl=CYWA&addnl=AR943&Add+to+charts=Add+to+charts&.cgifields=addnl
> CYWA, its model and same stations
> http://weather.gladstonefamily.net/qchart/CYwa?date=20160217&addnl=AV065&addnl=CYYB&addnl=AU770&addnl=AR943&Add+to+charts=Add+to+charts&.cgifields=addnl
> Chris
>


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