A-GRAVITY-CURRENT-OF-COLD-AIR_1980_Stratified-Flows

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A gravity current of cold air traveling from N W to S E in western Kansas, on a summer 
day in 1946. This picture was taken by Professor C. J . Posey, looking sw, while 
traveling west. Professor Posey kindly supplied this photograph, and furnished the 
following information: "The temperature was 96° F to S E , and 66° F to N W . Wind 
velocities were much higher inside the cold front than any we had noticed as it was 
approaching. Only the front edge was dusty. Later, the air cleared even though wind 
velocity stayed high