Rainfall recorded in August lowest in 19 years: IMD

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Rainfall in August, which recorded 24 p.c deficiency, was lowest in 19 years, the India Meteorological Department (IMD) stated on Friday.

Two main spells of weak monsoon prevailed over the nation — from August 9-16 and August 23-27 — when northwest, central and adjoining peninsular and west coast of India had subdued rainfall actions.

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“During August 2021, rainfall over the country as a whole was below Long Period Average (LPA) by minus 24 percent. It is also lowest August rainfall in last 19 years, since 2002,” the IMD stated.

The Southwest Monsoon season formally commences from June 1 and lasts until September 30. The month of June recorded 10 p.c extra rainfall, however each July and August clocked deficiency of seven and 24 p.c respectively, based on the IMD knowledge.

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The nation acquired 24 p.c lower than regular rainfall in August. Of the 4 meteorological divisions of the IMD, the central India division acquired 39 p.c much less. The division consists of a giant swathe of space from Maharashtra, Gujarat, Goa, Madhya Pradesh, Chhattisgarh and Odisha.

The deficiency within the northwest India division, which includes northern Indian states, was 30 p.c.

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The deficiency was 10 p.c within the south peninsula whereas the east and northeast division acquired two p.c extra rainfall than the conventional.

The IMD had predicted that the rainfall exercise was anticipated to be regular throughout August. It has now predicted above regular precipitation in September.

The climate forecasting company stated intra-seasonal variation when it comes to week by week rainfall variation over India reveals that monsoon rainfall actions have been largely subdued consecutively for 3 weeks — for week ending on August 11, August 18 and August 25 — when all India weekly cumulative rainfall for the nation as a complete was 35 p.c, 36 p.c and 21 p.c, respectively, under its Long Period Average (LPA).

The formation of much less variety of low strain methods (PLS) and their lesser variety of days in comparison with the climatology and absence of their longer westward actions in the course of the month of August 2021 contributed to the massive poor rainfall in central India in addition to all India, the IMD stated.

It stated destructive Indian Ocean Dipole (IOD) over tropical Indian Ocean, unfavourable for Indian monsoon prevailed all through the month of the August, which additionally contributed to poor rainfall over India within the month.

A destructive IOD is related to the heating of waters of the Indian Ocean.


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