Normally monsoon advances over most regions of country in the month of June except some parts of northwest India. There is large variability in the dates of advance of monsoon over different regions and also the quantum and distribution of rainfall which has a direct bearing on the sowing operations of kharif crops over many regions of India.
The Indian Summer Monsoon is characterized by large spatio-temporal variability on various scales. The pattern of variability in every year is unique. The South West Monsoon season extends through June to September. The normal date of onset of SW monsoon over Kerala is 1st June. The rainfall during June accounts for 19% of the seasonal rainfall. In this report some of the characteristic features displayed by the southwest monsoon 2011 in the month of June are analysed and presented in the following sections. This includes the observational aspects, anomalies in the circulation field and synoptic systems.>> More