[wxqc] Discussion of weather data quality issues

[Aledo Weather]

Hi Dave,

It's Keith Clark, CW2758. Sorry about that.....

I try and keep a close watch on KMLI (Moline, IL.), KDVN (Davenport, Ia),
KMUT (Muscatine, Ia.), and KGBG Galesburg, Il,) as I'm just about centered

25 Miles from each of them, Its difficult to get all their measurements at
the same time using Wunderground so I try and check them through Noaa.gov,
but there is still from time to time some good variations.

 

-----Original Message-----

From: wxqc-bounces at lists.gladstonefamily.net

[mailto:wxqc-bounces at lists.gladstonefamily.net] On Behalf Of Dave Helms

Sent: Monday, June 11, 2007 8:26 PM

To: Discussion of weather data quality issues

Subject: Re: [wxqc] FW: Wind Question

 

Hi,

 

What is your CWOP ID??  Tough to say regarding the wind performance.  

You can watch the local ASOS/AWOS and see how your wind observations compare
with their's which presumably are siting on an open runway.  

Necessarily, the difference between your anemometer elevation above ground
level (20 ft) and the desired elevation of 33 ft (10 meters) will reduce
your winds some, but the real problem for most folks is blockage from trees,
etc, at and above their anemometer height.

 

Great that you have made the siting and shielding changes for your temp/RH
sensors.  We don't encourage people "tweaking" their observations for
measurements (except for pressure), could be you may a correction to a bias
that is actual weather for your local climate.  

Russ has a large collection of shielding information at this link:  

http://www.wxqa.com/shields.html

 

Regards,

 

Dave

CW0351

 

Aledo Weather wrote:

 

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> *To:* 'wxqc at lists.gladstonefamily.net'

> *Subject:* Wind Question

> 

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> 

> I have my anemmeter mounted on a pole 20 feet high and 35 feet from 

> the nearest trees. Is this still too close to avoid the turbulent zone 

> around and at the top of these obstructions that will skew your 

> readings?

> 

>  

> 

> I just recently made some changes in my weather station location, 

> moving it out away from the house and installing the temp/hygrometer 

> sensors in a radiation shield I purchased from Ambient Weather. This 

> made a big difference in the reliability of the reading which I hope 

> to tweak a little better. Getting it out in the open is definitely the 

> way to go. Does anyone have a suggestion on how to do this and still 

> provide them some protection?

> 

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