Monitoring a tropical super cyclone Amphan over Bay of Bengal and nearby region in May 2020
2020
Mishra, Anoop Kumar | Vanganuru, Nagaraju
A tropical super cyclone Amphan was formed over Bay of Bengal during third week of May in 2020 and caused devastating impact in West Bengal. Present study focuses on exploring this super cyclone using high resolution accurate precipitation estimates from multi-frequency satellite observations from Meteosat 8. It is reported that low pressure system formed over Bay of Bengal developed into a cyclonic storm on May 16 due to favourable atmospheric conditions. On May 18, this cyclonic storm intensified into a super cyclone with rainfall amount exceeding 600 mm/day. We have examined the diurnal variation of heavy rainfall over severely affected districts of West Bengal after cyclone made a landfall. Purba Medinipur, North and South 24 Parganas, Kolkata, Hooghly and Howrah were most affected districts of the state. Heavy rainfall over few of these districts were in the range of 50–60 mm/h. Purba Medinipur recorded maximum rainfall of about 650 mm on May 20. Extreme rain events at multiple hours on May 20 resulted in heavy cumulative rainfall causing extreme flash flooding and landslides over these districts. Present study highlights the importance of usefulness of near real-time high-resolution satellite observations for exploring extreme events.
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