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Possibility of diurnal variation and formation of secondary vortices in the cyclone field as revealed by the radar study of the Arabian Sea cyclonic storm of June 1976

A diurnal variation in the organisation of cloud bands around the cyclonic storm was the main peculiarity of the Arabian Sea cyclone of June 1976, as observed by the radar. Also the occurrence of heavy rainfall on the coast was seen to lag behind the cyclone. This has been explained on the basis of possible formation of vortices on the right rear quadrant of the cyclone as indicated by the radar observations. Detailed radar observations and tentative explanations for the phenomena are presented.