This time, that data concerns the recent record-breaking cold across the northeastern U.S. which NOAA is trying to erase from history.
If you believe NOAA's charts, there was nothing particularly unusual about this winter's cold weather which caused sharks to freeze in the ocean and iguanas to drop out of trees.
Here is NOAA's January 2018 chart for Northeast U.S. – an area which includes New England along with NY, PA, NJ, DE and MD.
You'd never guess from it that those regions had just experienced record-breaking cold, would you?
That's because, as Paul Homewood has discovered, NOAA has been cooking the books. Yet again – presumably for reasons more to do with ideology than meteorology – NOAA has adjusted past temperatures to look colder than they were and recent temperatures to look warmer than they were.
We're not talking fractions of a degree, here. The adjustments amount to a whopping 3.1 degrees F. This takes us well beyond the regions of error margins or innocent mistakes and deep into the realm of fiction and political propaganda.