Monsoon is here! Hits Kerala three days ahead of schedule, says IMD
June
1 is the official onset date for arrival of monsoon in the country and it takes
more than a month-and-half to cover the entire country
Economy & Policy News: The southwest monsoon on Tuesday hit Kerala,
three days before its scheduled arrival, says the India Meteorological
Department (IMD).
The onset of monsoon over the southern state
marks the commencement of the four-month long rainy season in the country.
June 1 is the official onset date for arrival of monsoon in the country and it takes
more than a month-and-half to cover the entire country.
The IMD has made a forecast of
"normal" rainfall this season.
Skymet, a private weather forecasting agency and a rival of
the IMD, had said that the monsoon made its arrival in Kerala yesterday.
According to the IMD, if after May 10, 60 per cent of the
available 14 stations --Minicoy, Amini, Thiruvananthapuram, Punalur, Kollam,
Allapuzha, Kottayam, Kochi, Thrissur, Kozhikode, Thalassery, Kannur, Kudulu and
Mangalore -- report 2.5 mm or more rainfall for two consecutive days, the onset
of monsoon over Kerala can be declared on the second day. This is one of the
main parameters for declaring the arrival of monsoon.
Besides this factor, the westerly winds must be up to 15,000
feet above main sea level and outgoing long-wave radiation less than 200 wm-2
(watt per square metre) to declare the arrival of monsoon.
All the necessary parameters were met following which the onset
of monsoon over Kerala was announced, Mritunjay Mohapatra, Additional Director
General, IMD said.
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