‘Biparjoy’ second-longest cyclone over North Indian Ocean in 50 years | India News


NEW DELHI: With a total life period of 13 days and 3 hours, the cycloneBiparjoy’ that hit the Gujarat coast this month was the second longest duration cyclones over the North Indian Ocean, including the Bay of Bengal and the Arabian Sea, in the past around 50 years, shows the India Meteorological Department’s (IMD) final report on the event.
The longest duration cyclone over the North Indian Ocean (NIO), with a life period of 14 days and six hours, was reported during November 8-23, 1977. It developed over the Bay of Bengal (BoB) and weakened over the Arabian Sea (AS).
“Climatologically, about 66 cyclonic storms developed over the AS during 1965-2022. Out of these, eight crossed Gujarat coast during the period,” said the IMD while releasing the salient features of ‘Biparjoy’.
It said, “The average life period of the very severe cyclonic storm category during monsoon season over the Arabian Sea is 6 days and 3 hours based on data during 1990-2013.”
In recent years, extremely cyclonic storm Kyarr (October, 2019) over AS had a life period of 9 days and 15 hours. It developed over east-central AS, had multiple recurvatures and weakened over southwest AS. Very severe cyclonic storm Gaja (November, 2018) over south-east BoB too had a life period of 9 days & 15 hours. It developed over south-east BoB, crossed southern peninsular region, emerged into Arabian Sea and weakened over southwest & adjoining southeast AS.
Noting that the ‘Biparjoy’ exhibited a “frequently changing track of movement” during its life cycle, the IMD said, “The cyclone changed its path nine times, resulting in relatively higher difficulty in predicting the path of the cyclone.”
The ‘Biparjoy’ was the first cyclonic storm over the Arabian Sea in the year 2023. Its track length (depression to depression stage) was 2,525 km. Developed during the onset phase of monsoon over Indian region, it crossed Saurashtra & Kutch coast close to Jakhau Port with maximum sustained wind speed 115-125 kmph gusting to 140 kmph on June 15.
The cyclone was monitored with the help of available satellite observations from INSAT 3D and 3DR, SCAT SAT, ASCAT, microwave imageries, available ships & buoy observations in the region, Doppler Weather Radar (DWR) at Bhuj and Jaipur.
Various global models and dynamical statistical models, run by ministry of earth sciences institutions, were also utilized to predict the genesis, track, landfall and intensity of the cyclone as well as associated severe weather.

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