6 months ago
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October ended with excess rainfall implicit Tamil Nadu for the 2nd consecutive twelvemonth amid an progressive northeast monsoon. After a fewer days of adust weather, rainfall enactment is apt to prime up marginally successful the State from November 5.
The State has logged an wide rainfall of 23.3 cm, which is 36% supra its mean stock (17.1 cm) for October. Most districts ended the period with mean to supra mean rainfall, portion a few, including Ranipet, Tirunelveli, and Vellore, recorded mostly excess rainfall pursuing spells of dense downpour.
In October 2024 too, Tamil Nadu had received 21.4 cm of rainfall, which was 25% supra mean for the month. This October, Chennai territory excessively recorded surplus rainfall for the 2nd consecutive year.
Chennai’s Nungambakkam upwind presumption registered the 2nd highest October rainfall of the decennary with 32.4 cm. Last twelvemonth holds the grounds for the highest October rainfall successful Nungambakkam during the decade.
B. Amudha, Head (Additional in-charge), RMC said the NE monsoon has performed good implicit the past 5 years, bringing either mean oregon excess rainfall to the State. “This October, the State received rainfall astir regular but for the past fewer days. Active monsoon signifier contributed to the excess rainfall,” she said.
Noting that the archetypal fewer days of November volition bring lone adust upwind implicit T.N., she said models indicated an summation successful rainfall from November 5, with much clarity expected successful 1 oregon 2 days.
Meanwhile, the India Meteorological Department (IMD) has forecast November rainfall successful the State to beryllium apt beneath mean rainfall. In its monthly rainfall and somesthesia outlook, the section has predicted rainfall to beryllium beneath mean implicit astir districts. The State is apt to acquisition an above-normal somesthesia but for a fewer districts on the occidental ghats.
In a long-range forecast based connected the South Indian Ocean Convergence Zone model, a squad of erstwhile meteorologists of the IMD, including Onkari Prasad, indicated a probability of mean rainfall successful November. Districts specified arsenic Kallakurichi, Erode, and Tiruvarur whitethorn acquisition surplus rainfall.
Y.E.A. Raj, erstwhile Deputy Director General of Meteorology, said southwest monsoon rainfall successful the archetypal fortnight of October and aboriginal onset of northeast monsoon helped the State timepiece excess rainfall. The upwind strategy successful Arabian oversea that persisted for implicit 10 days besides accentuated the monsoon rainfall successful T.N.
While the State has already recorded astir fractional of its NE monsoon quota successful October, the season, known for its alternating bedewed and long, adust spells whitethorn adjacent retired the wide rainfall distribution, helium added.
