Outlier stations (another post that is pretty much just for my use)

 Outlier stations are what I call USHCN stations where the data is wildly different from the majority of climate stations.  I don't know why this is, but I don't use them when looking at trends.  It is definitely not always the UHI

Looking at all of the US it is clear that there is a regional climate change, that doesn't seem to fit the Bruckner cycles.  Speaking of, out of all the USHCN stations, only Dale Enterprise shows clear cycles when using Tmin data, which is very cool, and I have found no publications online that mention it.  

I probably have a post about this elsewhere but I don't feel like looking for it right now

Here is an example of an outlier from VA, Lincoln USC00444909   

It does not show the well known cooling starting in the mid 50s, and shows far too much cooling after 1995, compared with other quality stations in the Eastern US

If you are reading this, remember this is the actual data from stations, no alterations of any kind. 

Precipitation data from that station also does not match other stations in the region.

Related stations and climate change (shout out to Michael E. Mann)

Many years ago I read something from 

Michael E. Mann

 about related stations.  He said that station related in space to each other showed the same trends, and you could use stations 500 miles apart to get an idea of how large areas are changing.  My own research confirmed this, especially if you don't use outlier stations, where the data does not match the majority of stations.