[wxqc] Temperature "errors"

[Gary J. Ferdinand]

Hi Jim,

I have a similar issue.  What's  your topography like?  The quality checks
do not seem to account for topography.   With the advent of autumn here and
some crisp nights/mornings, my "night temperature" has frequently plummeted
way out of bounds.  As I look at the topo map I can see why.  I am in a
small valley with hills to the east and west of me, perhaps 100-200 feet
higher. They are quite close, within 100 yards or so.  I suspect in my case
that colder air is falling downslope and settling right over my house and
temp sensor.

Perhaps you have an unusually cold micro climate too?

Gary


> -----Original Message-----
> From: wxqc-bounces at lists.gladstonefamily.net
> [mailto:wxqc-bounces at lists.gladstonefamily.net]On Behalf Of Jim Pace
> Sent: Thursday, September 22, 2005 12:08 AM
> To: wxqc at lists.gladstonefamily.net
> Subject: [wxqc] Temperature "errors"
>
>
> I just signed on to this mailing list but have been receiving quality
> reports for a few months now. All along, I am seeing a pattern wherein my
> nighttime low temperatures are flagged as being in error(too low). This
> morning takes the cake. I just now received tonight's quality
> report and it,
> as usual flags my low temperature reading this morning of 32 degrees as
> being over 11 degrees too low according to the "algorithm". I'm
> here to say
> that I had to scrape that 11 degrees off my windshield this AM
> so's I could
> see out to drive to work. My now dead tomato plants didn't think it was
> really 11 degrees warmer either.
> It's bothersome to think that NOAA wants your data and then rejects good
> data because they don't believe it's correct. BTW I have a mercury
> thermometer that holds max and min temps and it agrees perfectly with my
> 1-Wire outdoor sensor. Is there anything can be done? Or should I give up
> and add 10 degrees to my CWOP postings?
>
> Jim
> http://ecapmiill.home.comcast.net
>
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