[wxqc] Dewpoints for CW5204 (John & Delta)

[Mike Barth]

Dennis,

Temperature and humidity are indeed reported by CWOP.  The MADIS QC uses
these to calculate dewpoint, and the QC is then applied to that variable.

Hope this clears things up,

Mike

On Wed, 1 Feb 2006, Dennis Maier wrote:

> I'm confused (nothing new for me) isn't Dew point a calculated value derived
> from temperature and humidity. I was under the impression only barometric
> pressure, temperature, humidity and wind info was transferred to CWOP. And
> if that is correct who/what is doing the dew point calculations?
>
> Dennis
> CW4869
>
>
>
>> -----Original Message-----
>> From: wxqc-bounces at lists.gladstonefamily.net
>> [mailto:wxqc-bounces at lists.gladstonefamily.net] On Behalf Of
>> dennis.carr at supportnow.org
>> Sent: Wednesday, February 01, 2006 3:30 PM
>> To: wxqc at lists.gladstonefamily.net
>> Subject: [wxqc] Dewpoints for CW5204 (John & Delta)
>>
>> I have a Lacrosse WS-2310 station which has the same problem
>> and I have been trying to figure out what to do. I built a
>> home made shield and with a constant fan drawing air across
>> the sensors and still have the problem.
>> I don't have any answers yet. You don't want to adjust with
>> the software I'm told. My the sensor is located 20 feet from
>> the house mounted on a pole 5 feet off the ground and is
>> located over a grass.
>> It says to adjust the dew point 3.3 °F higher.
>> http://weather.gladstonefamily.net/site/C4227?tile=10;days=91#Data
>>
>> Dennis
>> CW4227
>>
>>
>>  -----Original Message-----
>> From: wxqc-bounces at lists.gladstonefamily.net
>> [mailto:wxqc-bounces at lists.gladstonefamily.net] On Behalf Of
>> wxqc-request at lists.gladstonefamily.net
>> Sent: None
>> To: wxqc at lists.gladstonefamily.net
>> Subject: wxqc Digest, Vol 16, Issue 1
>>
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>> Today's Topics:
>>
>>    1. Dewpoints for CW5204 (John & Delta)
>>    2. Station Climate Data Files (Dave Helms)
>>    3. Re: Station Climate Data Files (Chris Topf)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Tue, 31 Jan 2006 21:42:04 -0500
>> From: "John & Delta" <jdkuhn at adelphia.net>
>> Subject: [wxqc] Dewpoints for CW5204
>> To: <wxqc at lists.gladstonefamily.net>
>> Message-ID: <20060201024153.DKYC8904.mta13.adelphia.net at jacob>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> Hi,
>>
>>
>>
>>    I have a Davis Pro 2 station which I have only had for
>> about 3 weeks now.
>> The analysis for the last 3 days
>> http://weather.gladstonefamily.net/site/C5204?tile=10;days=3#Data
>> shows a
>> significant mean error in the dewpoint readings.  I have the
>> sensor set a good distance from the house mounted on a pole
>> which is attached to a wooden post.  The sensor is 5 feet off
>> the ground and located over a grass area.
>> It says to adjust the dewpoint down 2.6 degrees but I really
>> don't want to do this unless absolutely necessary as it would
>> be masking the real problem.
>> Does anyone have any suggestion?
>>
>>
>>
>> Thanks,
>>
>>
>>
>> John
>>
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>> ------------------------------
>>
>> Message: 2
>> Date: Wed, 01 Feb 2006 01:20:08 -0500
>> From: Dave Helms <dshelms at comcast.net>
>> Subject: [wxqc] Station Climate Data Files
>> To: wxqc at lists.gladstonefamily.net
>> Message-ID: <43E05318.4040707 at comcast.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> Hi All:
>>
>> Hey... is February 1st, time to start your 2006 climate data
>> collection and processing!
>>
>> My data logging application does not really do what I want it
>> to do so I developed my own Excel spread sheet and I populate
>> it every month.
>> Over
>> the last several years I have developed a modest station
>> climatology of
>> 4 years by borrowing from the Baltimore-Washington Internationals
>> (BWI)
>> station means and using the station's data as a temporary
>> climatology baseline (in another 6 years I will have enough
>> statistics to form my own station's stats).  I monitor BWI
>> climate data and other area stations to see if my data are in
>> the ball-park.
>>
>> Here are some examples of the Excel files I have developed
>> for processing my station's climate data:
>>
>> CW0351 Station Summary for 2005:
>> http://mywebpages.comcast.net/brookevilleweather/2005_brookeville-md.x
>> ls
>>
>> CW0351 Template file for 2006 monthly climate data:  note I
>> added daily mean max/min temperatures this year
>> http://mywebpages.comcast.net/brookevilleweather/2006_blank_brookevill
>> e-md.xls
>>
>> Feel free to download the Excel templates and modify them for
>> your uses.  You can find reference climate data on you local
>> NWS Weather Forecast Office web page or go to the National
>> Climate Data Center
>> (NCDC) and order the closest COOP station climatology.
>>
>> Local Climate "Clubs":  I belong to the Washington-Baltimore
>> Climate Review (WBCR) which has a 20+ year history of
>> documenting the DC Metro
>>
>> weather, quite an impressive group run by Brian Smith
>> (bgs11111 at erols.com).  Brian compiles data from 200 area
>> stations, plots the data and manually contours the data then
>> snail-mails copies of his
>>
>> analyzes every month.  I encourage everyone to see if there
>> are any local climate groups to participate in!
>>
>> Regards,
>>
>> Dave
>> CW0351
>>
>>
>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 3
>> Date: Wed, 1 Feb 2006 05:17:42 -0800 (PST)
>> From: Chris Topf <topfcd at yahoo.com>
>> Subject: Re: [wxqc] Station Climate Data Files
>> To: Discussion of weather data quality issues
>> 	<wxqc at lists.gladstonefamily.net>
>> Message-ID: <20060201131742.15804.qmail at web53404.mail.yahoo.com>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Dave,
>>   thanks for the template submission.  I have had my VP2
>> weather station for about 10 months now and I have been a
>> little disappointed in the climate reporting features of the
>> Weatherlink software.  I like the overall report, but I am
>> disappointed in that it doesn't contain the mean temp
>> calculation like the NWS office monthly reports do and that I
>> can't export the report in a tab-delimited format so I don't
>> have to manually re-type the information into a spreadsheet.
>>   I think you've inspired me to embark on a climate project
>> for my station!  Although I've only had my VP2 for 10 months,
>> I've been maintaining precipitation records for 10 years this
>> July.  Wow, hard to believe it's been that long!
>>
>> Chris
>>   CW3603
>>
>> Dave Helms <dshelms at comcast.net> wrote:
>>   Hi All:
>>
>> Hey... is February 1st, time to start your 2006 climate data
>> collection and processing!
>>
>> My data logging application does not really do what I want it
>> to do so I developed my own Excel spread sheet and I populate
>> it every month.
>> Over
>> the last several years I have developed a modest station
>> climatology of
>> 4 years by borrowing from the Baltimore-Washington Internationals
>> (BWI)
>> station means and using the station's data as a temporary
>> climatology baseline (in another 6 years I will have enough
>> statistics to form my own station's stats). I monitor BWI
>> climate data and other area stations to see if my data are in
>> the ball-park.
>>
>> Here are some examples of the Excel files I have developed
>> for processing my station's climate data:
>>
>> CW0351 Station Summary for 2005:
>> http://mywebpages.comcast.net/brookevilleweather/2005_brookeville-md.x
>> ls
>>
>> CW0351 Template file for 2006 monthly climate data: note I added daily
>>
>> mean max/min temperatures this year
>> http://mywebpages.comcast.net/brookevilleweather/2006_blank_brookevill
>> e-md.xls
>>
>> Feel free to download the Excel templates and modify them for
>> your uses. You can find reference climate data on you local
>> NWS Weather Forecast Office web page or go to the National
>> Climate Data Center
>> (NCDC) and order the closest COOP station climatology.
>>
>> Local Climate "Clubs": I belong to the Washington-Baltimore
>> Climate Review (WBCR) which has a 20+ year history of
>> documenting the DC Metro
>>
>> weather, quite an impressive group run by Brian Smith
>> (bgs11111 at erols.com). Brian compiles data from 200 area
>> stations, plots the data and manually contours the data then
>> snail-mails copies of his
>>
>> analyzes every month. I encourage everyone to see if there
>> are any local climate groups to participate in!
>>
>> Regards,
>>
>> Dave
>> CW0351
>>
>>
>>
>>
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