[wxqc] Analysis

[Dave Helms]

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
>
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