The frequency of cloud detection and the frequency that these clouds are found in the upper troposphere have been extracted from NOAA/HIRS polar orbiting satellite data from 1979 to 2001. The HIRS/2 sensor was flown on nine satellites from TIROS-N through NOAA 14 forming a 22-year record. CO2 slicing was used to infer cloud amount and height. Trends in cloud cover and high cloud frequency were found to be small in these data. High clouds show a small but statistically significant increase in the tropics and the Northern Hemisphere. The HIRS analysis contrasts with the ISCCP which shows a decrease in both total cloud cover and high clouds during most of this period.