[wxqc] Please Help Me Understand

[dshelms at comcast.net]

Hi Dean,

Love the picture of the weather station silhouetted against the sunset posted on  FlICKR!  

Here are your statistics:
http://weather.gladstonefamily.net/site/C7327

The stats are good, except for the standard deviation dew point for the short time you have been reporting.  I believe the dew point standard deviation stat will improve given a few more weeks of observations and the red will turn into a green check.  

Cheers,

Dave
CW0351


 -------------- Original message ----------------------
From: <dean at mevis.org>
> Please help.  I am pretty new to all of this weather stuff.  And even
> though I have a pretty good understanding of statistics, I do not really
> understand the reports I am receiving.  Can you someone please review my
> data and make some suggestions.  My site is:  CW7327.
>  
> My station is a Vantage Pro 2.  I have been uploading data to FINDU for
> about a couple of months now.  
>  
> The chronology is approximately this:
>  
> 1) Started 2 months ago uploading data using VWS software.  Was getting
> some Temperature errors.  Sometimes just a couple of errors, sometimes
> 40+.
> 2) Unhappy with VWS software stability and resource usage so I switched
> to Weatherlink about 2 weeks ago.  Now seem to be getting even more
> errors, Temperature and Dew Point.
> 3) One week ago, moved the Temp/Humidity/Rain sensors from above my roof
> to just off of my deck.  This lowered the sensors by 20' and gets them
> away from my black roof.  Temperature accuracy seems to have improved,
> but I am still getting Dew Point errors.
> 4) Two days ago I realized I had a 5 degree offset plugged in for
> Humidity (which affects Dew Point).  I removed the offset and verified
> the humidity reading with two other instruments.  Dew Point seems to be
> improved, but I am still getting Dew Point errors.  
>  
> The problems seem much worse since I changed to Weatherlink software.
> Is there any reason that VWS software and Weatherlink software would be
> uploading different values?
>  
> I have already re-sited my temperature/humidity sensors.  Any ideas for
> how to further improve this?
>  
> Both before re-siteing and now, there seem to be differences between the
> daytime and nighttime errors.  What can I do about that?
>  
> I have made a number of changes in the last week which affect my data.
> Does Madis need to re-establish my area "norms"?  How long does this
> take? 
>  
> Should I just stop making further changes for a month and see how things
> look then?
>  
>  
> Any insight or help would be appreciated.
>  
>  
> Thank you.
>  
> Dean Mevis


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