I started comparing the July 29, 2012 BEST release to NOAA’s data here with Alabama.
Unlike Alabama which according to NOAA has cooled since 1895, North Dakota is one of the fastest warming states according to NOAA.
I assume BEST was happy with a fast warming state so they just warmed all the data. Every 5 year period (except for 3 and 1 no change) were warmed a small amount.
I cannot help but consluding that BEST had a goal in mind , or more likely their algorithm was designed to make all trends rise from past to present. If the real trend wouldn’t cooperate (like Alabama) they cooled the past and warmed the present. If the real trend was in the right direction, they just pretended to adjust the data.