[wxqc] CW4870 Temperature

[dshelms at comcast.net]

Hi Charles,

Welcome to the group!

We have seen some radiation shield problems with the LaCrosse stations in the past, especially the WS2300.  These problems have been mitigated successfully  with replacement of the LaCrosse "cone" shield which has very high restricted ventilation, with a standard "bee hive" or Gill shield who's horizontal plates allow the sensors to "breath" without solar contamination.

In the limited period of record for your station's operation, we are seeing a high "negative bias" (e.g. warmer than the surrounding stations, after an elevation correction).  This is very preliminary info, and it will take more time to get a better picture or performance.

To help us better assess your station's performance, could you please upload digital pictures of your weather station sensors to the FLICKR page using the instructions on this page:
http://mywebpages.comcast.net/brookevilleweather/flickr_setup.html


Thanks,

Dave
CW0351

P.S.  Hey Philip:   I don't think the most recent FLICKR "CWOP Metadata Group" member's pictures with "CWOP" tags are getting embedded in the WXQC station pages.  


 -------------- Original message ----------------------
From: "Charles M. Owen" <cmowen at att.net>
> Hi, I am sort of a newbie. I have only had my Christmas present La Crosse
> WS-3120TWC up for two weeks. These are my first QC reports. I am 27 miles
> from the closest known site that I am compared with. When should I start
> worrying about these readings? 
> 
>    DATE     UTC      SITE  *   ALT    * POT TEMP *  DEW PNT *    DD    *
> FF    
>                            *   (MB)   *  (DEG F) *  (DEG F) *   (DEG)  *
> (KNT)  
> 02-JAN-2006 0813    CW4870 *1013.(-0.2)*
> 59(-6.3)*51.8(-5.3)*199.(132.)*4.34(-2.6)
> 02-JAN-2006 1037    CW4870 *1011.(0.45)*
> 60(-6.9)*53.5(-6.2)*192.(6.08)*4.34(  -4)
> 02-JAN-2006 1052    CW4870 *1011.(0.85)*
> 60(-6.9)*53.1(-5.8)*190.(8.08)*5.21(-4.8)
> 02-JAN-2006 1102    CW4870 *1011.(0.63)*
> 60(-6.8)*53.1(-5.6)*182.(135.)*6.08(-5.3)
> 02-JAN-2006 1117    CW4870 *1011.(0.63)*
> 60(-6.8)*53.1(-5.6)*203.(114.)*6.95(-6.2)
> 02-JAN-2006 1132    CW4870 *1011.(0.63)*
> 61(-7.8)*53.7(-6.2)*249.(68.9)*3.48(-2.7)
> 02-JAN-2006 1147    CW4870 *1012.(-0.7)*
> 60(-6.8)*53.5(-5.9)*206.(111.)*7.82(  -7)
> 02-JAN-2006 1202    CW4870 *1012.(-0.7)*  59(-6.9)*53.5(-4.5)*236.(
> 19)*4.34(-3.6)
> 02-JAN-2006 Errs    CW4870 *   0/87   *  15/87   *   0/87   *   1/87   *
> 1/87   
> 02-JAN-2006 Smry    CW4870 *-0.3(
> 0.5)*-3.7(2.79)*-1.9(2.76)*43.3(76.2)*-3.3(3.01)
> 
> Note that times are in UTC. The values displayed are  'Observed (error)' The
> error value is 'analysis - observed'. I.e. if your observed value is higher
> than the computed value, then the error will be negative. You have to pick
> out the reading that is in error. The row with the time of 'Smry' is a daily
> summary and the data is  'mean(standard deviation)' for each observation
> during that day.
> 
> Graphs: http://weather.gladstonefamily.net/qchart/C4870?date=20060103
> 
> 
> 
> 
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