They also claim US temperatures rose 1.5 F since the 19th century., which is what the National Oceanic and Atmospheric Administration (NOAA) shows. The problem with the NOAA data is that it is fake data. NOAA creates the warming trend by altering the data. The NOAA raw data show no warming over the past century. The adjustments being made are almost exactly 1.5 F, which is the warming claimed in the article.