The North Indian Ocean basin is a much more closed basin unlike Pacific and Atlantic. Because of the closed nature it borrows a lot from West Pacific and South China Sea. It borrows moisture during Northeast Monsoon time. It borrows disturbances from South China Sea to trigger cyclones in Bay of Bengal. The closed nature…
Genesis sweet spot decides path of late November cyclones
After more than 3 weeks the daily rainfall chart for TN & PDC showed a positive anomaly on 18th November. The last day to show positive anomaly during NEM 2025 prior to this was 23rd October. The LPA earlier this week that had its genesis over Southwest Bay pretty much broke the dry spell. With…
WHEELER-KILADIS REPRESENTATION OF TROPICAL WAVES AND THE UTILITY OF HOVMÖLLER DIAGRAM
“Hovmöller said the idea of his construction of meteorological fields using a time-geographic coordinate representation was a mere lucky hit that emerged through creative spurt” Recollect from previous post that climate and weather were compared to low and high frequency atmospheric states respectively, similarly in tropical waves, we have four of them: MJO, ER, CCKW…
CLIMATOLOGY & WEATHER – THE TROPICAL PLANETARY WAVES CONUNDRUM
The wise assert that: “While climate is dictated by the sun and the earth’s axial tilt, weather is dictated by the tropical planetary waves.” While at most instances, the term “climatology” can be construed as governed by the natural law driving atmospheric features and oceanic currents, and the “ensuing weather”just follows the rules written therein, there are plenty of outliers…
Return of rains over most of Tamil Nadu
Northeast Monsoon after a very long lull is finally getting back on track. The 36% excess during October is now a distant memory as seasonal status stands at -9% as of yesterday. But there is a fair bit of confidence that the driest phase of NEM 2025 is over. From today rains are liekly to…