Areal and point distribution of rainfall associated with depressions/storms on the day of crossing the east coast of India

Abstract

An attempt has been made to study areal and point distribution of rainfall associated with depressions/storms over the coastal areas 150 miles wide and 150 miles inland; on either Bide of the storm tracks on the day these disturbances cross the east coast of India between Lats. 8"N and 22"N. The east coast has been divided for this study into three broad sections -Tamil Nadu coast (Lat. 8" to 15"N), Andhra coast (Lat. 15" to 19"N) and Orissa coast (Lat. 19" to 22"N). 26 disturbances have been selected which crossed the east coast at or near about 0300 GMT, the synoptic hour at which 24-hour rainfall all over the country is recorded. In the case of Orissa coast, as a test case study has been made of about 20 disturbances which crossed the coast at different synoptic hours and the results obtained from both these cases have been found to be almost similar.