Aircraft measurements of profiles in the katabatic wind during the experiment KABEG (Katabatic wind and boundary-layer front experiment around Greenland) in April and May 1997. The aircraft used was the research aircraft POLAR2 (Dornier 228) owned by the Alfred Wegener Institute (Bremerhaven, Germany). The vertical profiles were flown as slantwise aircraft profiles (ascents or descents). The data represent averages of consecutive vertical profiles representing a horizontal scale of about 15km for three locations in relatively homogeneous terrain in west and southeast Greenland. The vertical resolution is 10 m for the lowest 200m and 20m between 200 and 340m. A total of 14 profiles of potential temperature, specific humidity, wind speed and direction are included in the data set.