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New Delhi : Southwest Monsoonset in over Kerala 1st June 1, 2020, coinciding with its normal date, and thereafter it advanced and covered entire Kerala, Tamil Nadu, Karnataka, Goa, Puducherry, Telangana, Andhra Pradesh, northeastern states, most parts of Odisha, West Bengal, Sikkim, and some parts of Maharashtra and Chhattisgarh as on June 12, 2020.
It has been nearly normal advance over most part of the above region except northeastern states where it has been delayed by 6-days, according to the National Weather Forecasting Centre/Regional Meteorology Centre, New Delhi, India Meteorological Department.
For the country as a whole, seasonal cumulative rainfall during this year’s southwest monsoon till June 11, 2020, is above Long Period Average (LPA) by 34%. It is above by 42%, 95% & 28% above their LPA over northwest, central & south peninsular India respectively, according to a PIB release.
The timely progress of southwest monsoon is due to formation two low pressure systems, one over southeast Arabian, which intensified up to a Severe Cyclonic Storm, NISARGA, crossed South Maharashtra coast during June 2-5, 2020, and another system over eastcentral Bay of Bengal & moved towards south Odisha coast during June 7-12, 2020. The low pressure area lies over north Coastal Andhra Pradesh, adjoining Coastal Odisha, and neighbourhood.
Under the influence of above systems, a) Scattered heavy to very heavy with isolated extremely heavy rainfall (≥ 20 cm) very likely over Konkan & Goa and isolated heavy to very heavy rainfall over Madhya Maharashtra, Marathawada, Coastal Andhra Pradesh and Yanam, North Interior Karnataka, Chhattisgarh, Telangana, Vidarbha, Assam, Meghalaya during next 24 hours; scattered heavy to very heavy with isolated extremely heavy rainfall likely over Vidarbha and isolated heavy to very heavy rainfall over Coastal Karnataka, Madhya Maharashtra, Chhattisgarh, Telangana, Assam & Meghalaya during subsequent 24 hours.
b) Conditions are also becoming favourable for further advance of Southwest Monsoon into some more parts of Central Arabian Sea, remaining parts of Maharashtra (including Mumbai), Odisha and West Bengal, some more parts of Chhattisgarh and some parts of south Gujarat State, south Madhya Pradesh, Jharkhand, and Bihar during next 48 hours.