Cyclogenesis and the Low-Level Jet over the Southern Great Plains.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
An investigation of the development of the low-level jet as an integral part of winter extratropical cyclones on the lee side of the Rocky Mountains during the winter months of 1977 and 1978 is presented. Twenty-nine cases of cyclogenesis were identified during the time period. Data for each case were tabulated, and, based upon the results of the study, four cases were chosen for closer examination. All cases were analyzed using standard synoptic methods supplemented by charts of the wind at the level of the maximum wind in the lower troposphere. A descriptive model which shows the simultaneous development of the cyclone and low-level jet is presented. The formation of the low-level jet is shown to be partially a result of the geostrophic adjustment of initially isallobaric wind. This isallobaric wind results from pressure falls on the lee side of the Rockey Mountains during cyclogenesis.