In response to a comment, this post shows the effect of GHCN adjustments on each of the 23 stations. The average station was warmed by +0.58 C/Century, from +.18 to +.76, comparing adjusted to unadjusted records.

19 station records were warmed, 6 of them by more than +1 C/century. 4 stations were cooled, most of the total cooling coming at one station, Tallahassee.

So for this set of stations, the chance of adjustments producing warming is 19/23 or 83%.

			Unadjusted	Adjusted	Adjusted – Unadjusted
		Years in	Stn Trends	Stn Trends	Stn Trends
		Record	°C/Century	°C/Century	°C/Century
351862	CORVALLIS	125	0.38	1.05	0.67
350412	BAKER CITY	125	-0.01	1.48	1.49
51564	CHEYENNE WELLS	118	0.84	1.18	0.34
83186	FT MYERS	121	1.18	1.05	-0.12
121873	CRAWFORDSVILLE	115	-2.00	-0.43	1.57
97847	SAVANNAH	141	-0.09	0.56	0.65
42941	FAIRMONT	93	0.90	1.91	1.01
48702	SUSANVILLE	119	0.04	0.84	0.81
80211	APALACHICOLA	111	-0.07	0.95	1.02
86997	PENSACOLA	135	0.27	0.10	-0.17
88758	TALLAHASSEE	123	0.07	-0.48	-0.54
160549	BATON ROUGE	122	-0.07	0.74	0.81
226177	NATCHEZ	121	-0.78	0.59	1.37
238466	TRUMAN DAM & RSVR	122	-0.56	0.62	1.19
245690	MILES CITY	123	0.28	0.31	0.03
269171	WINNEMUCCA	137	0.39	1.11	0.71
308383	SYRACUSE	112	0.78	0.73	-0.05
322188	DICKINSON	120	0.59	0.69	0.11
325479	MANDAN	102	0.43	0.68	0.25
369728	WILLIAMSPORT	120	0.10	1.01	0.92
376698	PROVIDENCE	130	0.68	1.25	0.56
417945	SAN ANTONIO	130	0.30	0.92	0.62
15749	MUSCLE SHOALS	74	0.54	0.58	0.04
	Averages		0.18	0.76	0.58