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There is a 55 per cent chance of a weak La Nina affecting global weather and climate patterns over the next three months, the World Meteorological Organization (WMO) said on Thursday. La Nina usually brings a temporary cooling effect on global average temperatures but many regions are still expected to record warmer-than-normal conditions, the UN climate and weather agency said in its latest update. La Nina and El Nino are opposite phases of a Pacific Ocean climate cycle known as El Nino-Southern Oscillation (ENSO). La Nina is the periodic large-scale cooling of sea surface temperatures in the central and eastern equatorial Pacific Ocean and is linked to changes in tropical winds, pressure and rainfall. El Nino is the "warm phase" of this cycle. It often weakens India's monsoon and increases the chances of drought. According to the latest forecasts from WMO's Global Producing Centres for Seasonal Prediction, oceanic and atmospheric indicators in mid-November 2025 point to borderlin
Cyclone Ditwah got weakened into a deep depression and the weather system would be centred over southwest Bay of Bengal within a minimum distance of 20 km from the coasts of North Tamil Nadu and Puducherry by morning of December 1, the Regional Meteorological Centre said. In an update, the weather office said the Cyclone Ditwah is located about 80 km east of Cuddalore, 130 km northeast of Karaikal, 90 km east southeast of Puducherry, 180 km northeast of Vedaranyam and 140 km southeast of Chennai. "The minimum distance of the centre of the cyclone from north Tamil Nadu-Puducherry coasts is about 80 km. It is very likely to move nearly northwards parallel to North Tamil Nadu-Puducherry coasts and weaken into a depression around morning of tomorrow (December 1)" the bulletin issued by the Met office late on Sunday night said. "The cyclone is moving at a speed of 5 kmph and the system would be centred over southwest Bay of Bengal within a minimum distance of 40 km and 20 km from the nor