Hi Frank, didn't read through the whole thread, too much hate!
Here's how we perform QC
steps
1) Sanity, can this temp, dewpoint, precip amount... possibly exist on earth
2) temporal check, is the station doing something funny that makes it unlikely the readings are correct (mainly, is the value not changing at all)
3) spatial check. this one only applies to temperature, how well does your temperature compare to that of your neighbors
What dont we do with this info?
We don't do too much with this for the web site. The PWS dashboard pages are multi use, they are there for public consumption and also for the owner of the PWS to see the data they provide. We should do more to surface the QC checks we perform
What DO we do
1) goldstar if you pass all quality control checks for EVERY Temperature observation you send for 5 days (or on some cases less) you get a gold star. If you send 1 bad ob, the clock is reset.
2) maps If you are sending bad data, your station will not display on the wundermap, or even the PWS dashboard page map.