The article shows you (literally with a couple of photos) how the warmers get these astoundingly warmer record nighttime temperatures. The warmers, as usual, are hollering about how this is more proof-positive we have global warming.
Just look at the photos to see what I am laughing about. You can easily see that they “conveniently” place the sensors around paved areas that retain heat long after the sun has gone down and thus raise the nighttime temperatures. How tricky indeed. They also like to place them near air conditioning exhausts and at the end of airport runways subjected to heat from jet engine exhausts day and night. I even saw a photo of one in California mounted on a fireplace chimney with the sensor above the flue.