A panel consisting 40 weather scientists are working on revising the normal onset dates for monsoon, across the country. Scientists thought about revising the monsoon onset dates for south west monsoon as they were based on the limited information of less than 40 years.
Ajit Tyagi, Director General of IMD said that there will not be any significant difference but the new monsoon dates may vary only by one or two days. Tyagi said that the earlier days were based on monsoon data between the years 1932-'70. The Mateorological Department has more comprehensive analysis of the seasonal rains till 2009, he said.
Jun 1 is the normal date for the onset of monsoon all over Kerala and in Delhi, it will be Jun 29. The new datasets could vary the date by a couple of days.
Tyagi said that the dates provided by them are only pointers and are subject to variation of plus or minus seven to eight days, as monsoon is a highly dynamic phenomenon.