5 months ago
1
Cyclone Ditwah and its remnant stalled for respective hours and moved dilatory arsenic it became trapped successful a calm ‘col’ portion betwixt 2 opposing anticyclonic circulations successful the precocious atmosphere, resulting successful prolonged rainspell, noted meteorologists.
While the strategy was expected to determination distant from T.N. seashore by Monday (December 1, 2025), it remained stationary for respective hours and drew successful much moisture, generating caller bands of rain-bearing clouds that deed the agelong adjacent Tiruvallur and Chennai, they said.
Read:Cyclone Ditwah LIVE updates
B. Amudha, Head (Additional in-charge), Regional Meteorological Centre, said the system, which was lodged betwixt the 2 anticyclonic circulations was oscillating nether the propulsion and propulsion of the surrounding winds. “It is hard to forecast specified microphysical changes that hap continuously successful the atmosphere, overmuch up and accelerated changes tin beryllium tracked lone implicit abbreviated periods. The interactions betwixt land, water and ambiance changes lend to unreality dynamics successful a analyzable manner. Our knowing of the interior dynamics of tropical cyclones is not complete,” she said.
Meteorologists noted that forecasting specified behaviour successful the tropics is challenging, particularly since upwind models person limitations. Sometimes, upwind models cannot foretell erstwhile upwind systems’ question stalls.
Y.E.A. Raj, erstwhile Deputy Director of Meteorology, Chennai, said cyclone Ditwah was a marginal cyclone with upwind speeds reaching up to 40 knots. The singular slowdown of the strategy was unexpected and question was dilatory astatine 2-3 kmph.
Typically, depressions oregon cyclones dilatory down earlier recurving. This strategy recurved towards southwestwards alternatively of the accustomed northbound oregon eastbound direction, which is simply a uncommon occurence for tropical cyclones. When they determination northwards, the systems would prime up speed.
During the play betwixt 1981 and 2024, lone 3 upwind systems recurved and moved towards southwest absorption successful November 1996, November 2013 and December 2018, helium added. The hold successful rainfall was owed to vagaries of weather, arsenic the system’s behaviour was influenced by rapidly changing atmospheric conditions.
