Results of a brief descriptive study of the diurnal wind variation over the central United States are presented. Six-hourly rawin observations for July, 1958, at Fort Worth and Shreveport were used to compute the average wind oscillation at selected levels up to 25 km. Two prominent diurnal wind regimes were observed above the boundary layer oscillation centered at 0.6 km. Maximum amplitudes of the upper-level oscillations were observed at about 5 km and 12 km. Limited analysis of rawin data from other stations indicates the observed diurnal wind system extended from the Appalachian Mountains westward to the Rocky Mountain area. Abstract Results of a brief descriptive study of the diurnal wind variation over the central United States are presented. Six-hourly rawin observations for July, 1958, at Fort Worth and Shreveport were used to compute the average wind oscillation at selected levels up to 25 km. Two prominent diurnal wind regimes were observed above the boundary layer oscillation centered at 0.6 km. Maximum amplitudes of the upper-level oscillations were observed at about 5 km and 12 km. Limited analysis of rawin data from other stations indicates the observed diurnal wind system extended from the Appalachian Mountains westward to the Rocky Mountain area.