[wxqc] Analysis

[Marion C. Maher]

Hi Dave, thanks for your response, and sorry it took so long to get back to
you.  I am CW5915.  My sensor has an aspirated shield, or one with vents
that look like gills.  It does not have a fan.  I did also move it to a
better location.  It is never in the sun, and is not near any heat source,
or concrete or asphalt that is heated by the sun, so I am puzzled as to why
the QC site says that I am experiencing a solar radiation problem.  I have
sited it the best way I can for my location and for the buildings, roads,
trees, etc. in the area.  I received a response today from Mark Albright,
University of Washington Atmospheric Sciences that I have attached.  He says
my data is OK and I think my data is OK, even though the quality check site
still has a big red X for my temperature data.  So I guess I will continue
on as I am doing, and hope that my data is being useful.  Anything you can
add to further educate me would be helpful and appreciated.

Thanks,

Marion

----- Original Message ----- 
From: "Dave Helms" <dshelms at comcast.net>
To: "Discussion of weather data quality issues"
<wxqc at lists.gladstonefamily.net>
Sent: Friday, June 30, 2006 10:01 PM
Subject: Re: [wxqc] Analysis


> Hi Marion,
>
> What CWOP station ID are you?  We really need this info when people ask
> for feedback on QC for their station.
>
> The hardware instructions you refer to are not correct, you should read
> the CWOP Station Guide to get a sense of proper siting:
> http://mywebpages.comcast.net/dshelms/CWOP_Guide.pdf
>
> Without looking at your station time-series, siting temperature sensor
> under a house eve causes you to measure the trapped heat under the eve,
> and not the ambient, well mixed, atmospheric temperature.  The LaCrosse
> "cone" itself, which I suspect you have, is not a proper radiation
> shield as it traps heat due to a lack of ventilation.  We suggest the
> Cone be replaced with a Gill-type shield (see the CWOP Guide).
>
> Hope this helps,
>
> Dave
> CW0351
>
> Marion C. Maher wrote:
>
>>I am new to uploading data to CWOP and am still in the stage of figuring
>>things out.  When I first started uploading, the analysis said that my
>>temperature readings were too high, so I "tweaked" the data on the WUHU
>>software to 99% of normal, and then for a few weeks it said the readings
>>were good.
>>
>>The last few days the analysis says that I am experiencing a solar heating
>>problem.  My
>>sensor is located on a 1x1" board on the North side of the house about 6
>>feet off of the ground, and about 4 feet below a deep eave.  This was a
>>method the instructions that came with the equipment said could be used to
>>locate the sensor.  This location never gets the sun, it is always in the
>>shade.  It also has a radiation shield that came with the unit
>>that has vents, no fan.
>>
>>I also have questions about the analysis process, is this done by
>>comparing
>>data from other local sources?  If so, the closest source you have listed
>>is
>>the one at Quillayute Airport, 8.6 miles west and quite a bit lower in
>>elevation.  They are only 3 miles or so from the coast and thus
>>temperatures
>>are lowered by the proximity to the ocean and the lower elevation.  I am
>>sure you know this already and I don't mean to have an attitude of telling
>>you your business, as I am also sure you are quite a bit more experienced
>>at
>>this than am I.  If you can educate me and are willing, I would greatly
>>appreciate it.
>>
>>I am also wanting to know what "unverified" means in the response that the
>>WUHU software is getting from CWOP about my data.  Is there something I
>>need
>>to do or correct to have a "verified" status?
>>
>>Thank you for your response and education, it is greatly appreciated.
>>
>>Marion
>>Forks, WA
>>
>>_______________________________________________
>>wxqc mailing list
>>wxqc at lists.gladstonefamily.net
>>http://pond1.gladstonefamily.net:8080/mailman/listinfo/wxqc
>>
>>The contents of this message are the responsibility of the author.
>>
>>
>>
>>
>
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From: "Mark Albright" <albrightm at comcast.net>
Subject: your CWOP data
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