Abstract: Damaging foehn winds, locally known as ?chinook? winds, are loosely defined and generally described for the east slopes of the Montana Rockies. Three upper-level patterns associated with chinook episodes in Montana are ...

Abstract: An index for the development of clear air turbulence on a synoptic scale is derived using the time rate of change of the Richardson number following the air motion, the so-called diagnostic Ri tendency. The method used in ...

Abstract: Lindzen's theoretical predictions of the thermally driven diurnal tide are compared with observations of the diurnal amplitude and phase of the meridional wind component between 30 and 60 km for five groups of stations ...