This is an example of how NOAA produces global warming, they just change the data to suit their political needs. Here is one example from Maine using NOAA’s own data.
This Maine data was captured in 2013. Note no warming trend.
After a major upgrade to the NOAA database, the warmest year was reduce by 5 degrees an assigned a middle of the pack position. Now we have an NOAA generated warming trend for Maine winters. See how the warming magic happens, just adjust the data. Make the past colder and the present warmer, and all of a sudden we have global warming.
See how easy it is to fool people on the left who refuse to look at the historical data, choosing instead to rely on appeals to authority arguments. An authority that can adjust the data to fit the politics of the day.