Genesis and rapid weakening of tropical cyclone Lehar (2013)

V. P. M. Rajasree, Jyoti N. Bhate, Amit P. Kesarkar () and Vikas Singh
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V. P. M. Rajasree: National Atmospheric Research Laboratory
Jyoti N. Bhate: National Atmospheric Research Laboratory
Amit P. Kesarkar: National Atmospheric Research Laboratory
Vikas Singh: National Atmospheric Research Laboratory

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2021, vol. 109, issue 1, No 17, 388 pages

Abstract: Abstract Tropical cyclogenesis and rapid weakening are subjects of considerable interest in the literature. This paper addresses the genesis and rapid weakening of a North Indian Ocean tropical cyclone Lehar (November 23–28, 2013). High-resolution analysis has been created by assimilating GPSRO observations using WRF and 3DVAR assimilation techniques. The parent disturbance of tropical cyclone Lehar is traced back using a moisture variable, and it is found to be originating from a westward-moving disturbance. The pathway of genesis is found to be bottom-up, with the vorticity developing from below. Tropical cyclone Lehar weakened from a Category 1 cyclone on November 26, 2013. We analyzed the prospects that contributed to the abrupt drop of tropical cyclone Lehar’s intensity in view of this. The analysis shows dust in the post-genesis (rapid weakening) environment of tropical cyclone Lehar. The analysis of total precipitable water in the post-genesis environment shows that the environment is very dry (

Keywords: Tropical cyclogenesis; Bottom-up pathway; Rapid weakening; Dry air intrusion; Mesoscale modeling (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/s11069-021-04840-4

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