[wxqc] Temp Issue Maybe

[dr. Lee]

Chuck, the national weather service standard for the instrument package
except the wind speed instrument is 3m above the ground.  The anemometer
should be at 33ft above the ground but, no site is perfect.  Adjust your
software or move the instrument package to a location that works with all
graphs.  Does your instrument package have a fan that keeps the air moving
over the sensors?  If you do not have this option on a davis you can and
probably will get a higher temp during the day as the sun will warm the
cover and the cover will increase the temp of the air inside around the
sensors.

The graphs are a comparison of all stations in the area you are so if there
are other systems in town all would show the increase in temp and this would
tend to null out the increase.  It still looks like you need a fan to keep
the air moving inside of the instrument package to solve your problem.  Look
at the graph of another station close to you and compare the temps during
the day and at night to see if there is a difference and how much there is
day and night as day time can again increase the temp inside of the
instrument cover unless you have a fan that keeps the air moving thought the
unit.

N5IHE

> -----Original Message-----
> From: wxqc-bounces at lists.gladstonefamily.net 
> [mailto:wxqc-bounces at lists.gladstonefamily.net] On Behalf Of 
> Chuck Goble
> Sent: Sunday, July 09, 2006 11:56 PM
> To: wxqc at lists.gladstonefamily.net
> Subject: [wxqc] Temp Issue Maybe
> 
> 
> I am new to the forum so be easy with me. I will do my best 
> to describe 
> my issue. I have a Davis VP2 wireless standard version. I am 
> located in 
> Minot, North Dakota. I don't if it is an issue or what. I had my ISS 
> located on a mast on my roof along with the anemometer. The ISS was 
> about 5ft above the roof top and roughly 20 ft. above the 
> ground and my 
> temp readings where within CWOP deviations. Then I relocated my ISS 
> about 4.5 ft above the ground. Then my temp readings are 
> higher and now 
> red x according to CWOP. According to the manual you want it no more 
> than 6 ft above the ground if I remember correctly. There is 
> not a lot 
> of trees around and for the most part it is in an area that 
> gets plenty 
> of breeze when it blows.
> 
>  The couple of questions that I have is I live right in the middle of 
> town wouldn't my temps be a bit higher due to the fact being in the 
> middle of town the heat will dissipate slower so my temps 
> will be higher 
> for the most part. The other two CWOP stations one is on the edge of 
> town and the other one which is the airport is in the wide open area. 
> I'm thinking my temps will be different than theres. My next 
> question is 
> if my temps are high and my humidity is running 4.5% drier why is my 
> dewpoint almost right on. But the graph to me does not look that way. 
> Maybe I am reading the graphs wrong.
> 
> I hope this is not to long. If I missed anything please let 
> me know and 
> I will get what info you need if I can. Sorry again if this 
> is too long.
> 
> Thanks,
> Chuck
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