I’ve plotted up some USHCN station information for the 18 sites closest to Susanville (why Susanville – it’s one of the Anthony Watts- Russ Steele sites that they happened to post on lately.) I’ve been reading Karl and Williams 1987 which sort of describes the USHCN Station History Adjustment method. I’ll talk about Karl and Williams 1987 on another occasion – it deserves a very close reading as its adjustments are embedded in all the present gridcell calculations. Karl and Williams say that they consider the 20 nearest stations in their Station History Adjustment. I plotted 18 to fit in 3 columns and the graphics are already very cramped. I’ll show 3 of the 7 versions below:
1) the USHCN “raw” (Areal) version
2) the GISS adjusted version
3) the USHCN time-of-observation adjusted version. This is the most lightly adjusted method and there is a valid argument for a time-of-observation adjustment. But the Team tends to show this relatively well-argued and documented adjustment and then lever a lot of other adjustments on the back of this.
First the unadjusted USHCN data for the various sites (this would equate to what one is the starting point in the rest of the world, where USHCN-type adjustments are not done. In this version, Reno and Quincy warm relative to the other sites. Warming in the 1930s is most prominent at Susanville and Cedarville, while late 19th century warming is most prominent at Chico and Orland.
Next here is the version adjusted only for Time-of-Observation bias. Late warming most prominent at Reno, Quincy, Fallon and to some extent, Marysville. Nineteenth century warming is prominent in a number of series: Chico, Marysville, Orland, Willows and the 1930s are warm in Cedarville, Susanville, Willows, Electra and some other sites. The alternations between the TOBS-adjusted series shown above and the GISS adjusted series below are all to do with changes of station location and urban heating. At the Cedarville, Susanville and Willows stations, there is no evidence of major station relocations nor is there any obvious justification for reducing their 1930s temperatures as an urban heat island adjustment.
Finally here is the GISS adjusted version, incorporating both USHCN and GISS adjustments (which in some cases undo USHCN adjustments). Susanville, Cedarville, Orland and Willows – all pretty decent looking sites from the northern California site information – are now cooler in the 1930s than at present. The warm 19th century record at Marysville and Willows are deleted.
According to my count, Anthony Watts and Russ Steele have pictures and microsite information of 20 stations in northern California, which all happen to be relatively close to one another. I’ve collected links to these pictures below. I’ve listed the 20 USHCN sites closest to Susanville. There’s nothing magic about Susanville, except that the USHCN Station History Adjustment method compares stations to their 20 nearest neighbors and Anthony Watts and Russ Steele have collected microsite information from a number of sites in northern California, which are in the Susanville list. I’ll add to the information as more turns up or am reminded of omissions.
 BLY 3NW
 CHICO UNIV FARM discussion
 COLFAX picture
 DAVIS EXP FARM 2WSW
 ELECTRA PH
 FALLON EXPERIMENT STATION
 KLAMATH FALLS 2SSW
 LAKE SPAULDING pictures1 pictures2 spaghetti
 LAKEVIEW 2NNW
 MARYSVILLE pictures
 MOUNT SHASTA
 ORLAND pictures
 QUINCY 1 2
 REDDING WSO pictures
 RENO WSFO AP
 SUSANVILLE AP link to pictures
 TAHOE CITY pictures spaghetti
 WILLOWS 6W pictures spaghetti
Hansen’s Unlit Seventeen
Here’s a list of Hansens unlit California 17 (overlapping somewhat with links identified to date.)
DEATH VALLEY, John Daly
FORT BRAGG 5N,
HAPPY CAMP RS,
LAKE SPAULDING, pictures1 pictures2 spaghetti
NEEDLES FAA AP,
SUSANVILLE AP, link to pictures
WILLOWS 6W, pictures spaghetti
YOSEMITE PARK HEADQUARTERS.