[wxqc] Analysis Anomalies varying between sites

[Victor Engel]

I have linked here an analysis for my station and KATT, the closest station
to mine. Notice the weird jump in humidity near the left end of the graphs.

http://weather.gladstonefamily.net/qchart/C6155?date=20060924&addnl=KATT&Add+to+charts=Add+to+charts&.cgifields=addnl

OK. Now let's look at the analysis for KATT with my station added. This
should be essentially the same graph but with a different analysis.

http://weather.gladstonefamily.net/qchart/KATT?date=20060924&addnl=C6155&Add+to+charts=Add+to+charts&.cgifields=addnl

Notice how close the analysis tracks my station? I guess that's no surprise,
really, since, if my station is used in the analysis for KATT, they should
have a good correlation. So then what causes the anomaly on my analysis?
Presumably, it would involve a station used in my analysis and not one for
KATT. But adding all the stations with checkboxes, I don't see any station
that correlates to the analysis.

Here is a link showing all the sites with checkboxes on my analysis that are
not on the KATT analysis.
http://weather.gladstonefamily.net/qchart/C6155?date=20060924&addnl=KATT&addnl=AR839&addnl=AR384&addnl=C6261&Add+to+charts=Add+to+charts&.cgifields=addnl

The only station correlating the the blip is KATT, but the amplitude is much
greater for the analysis than for KATT. Does the analysis think there is
some weather feature that is closer to me than to KATT because none of
KATT's neighbors show it? Or is the analysis based upon stations not present
on either list? Or is there simply a problem with the analysis, or something
else?
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