Abstract
—Several major features of the interaction of the Somali jet with the Western Ghat Mountains have been observed. These include a pressure ridge, strong vertical motions, and occurrences of highly reflective cloud and heavy rainfall rates along the west coast of India. A triple nested regional weather prediction model has been used to investigate the dynamic interaction between the Somali jet and the Western Ghat Mountains. Two numerical experiments were conducted; one with the topography of western India and the other without. In the experiment without topography, the Western Ghat Mountains were removed from the innermost domain. The results for the innermost domain in the two experiments were analyzed and compared. The results from the simulation with topography captured several of the observed features of the Somali jet interaction with the Western Ghat Mountains. The simulation without topography failed to reveal these features. The results suggest that the blocking effect of the Western Ghats plays an important role in the prediction of the rainfall over the west coast of India.
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