Role of Ocean Heat Content in the Rapid Intensification of Cyclone Amphan (2020) over the Bay of Bengal

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Role of Ocean Heat Content in the Rapid Intensification of Cyclone Amphan (2020) over the Bay of Bengal Author:Kritajno Bhattacharya Abstract   A major forecasting challenge in the North Indian Ocean is the rapid intensification (RI) of tropical cyclones, especially in the Bay of Bengal, where coastal communities are extremely vulnerable. The main indicator of cyclone intensification has historically been sea surface temperature (SST). Since it captures the total thermal energy available for cyclone growth outside of the surface layer, subsurface ocean heat content (OHC) has lately been acknowledged as a more accurate metric. This study examines how OHC contributed to Super Cyclonic Storm Amphan's (2020) quick intensification over the Bay of Bengal.We'll examine the atmospheric and oceanic factors that contributed to Amphan's abrupt intensification using Tropical Cyclone Heat Potential datasets, in-situ Argo float observations, and best-track records from the India Meteorol...
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West Bengal Weather Daily Bulletin — August 26th, 2025

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INDIAN WEATHER DESK

DAILY DISTRICT WEATHER BULLETIN – WEST BENGAL

Date of Issue: 26.08.2025 (1200 IST)
Valid for 24 hours: 26.08.2025 0530 IST to 27.08.2025 0530 IST



SYNOPTIC OVERVIEW

As of 26.08.2025, the monsoon trough remains active and close to West Bengal. A cyclonic circulation persists over Bangladesh and adjoining Gangetic West Bengal, enhancing moisture inflow from the Bay of Bengal. As a result, widespread rainfall with heavy to very heavy spells is likely across several districts. IMD has issued Orange Alerts for northern districts due to the risk of flooding and landslides.




SOUTH BENGAL CLUSTER

(Kolkata, Howrah, Hooghly, North & South 24-Parganas)

Weather: Moderate to heavy rain with thunderstorms, especially during afternoon and evening hours.

Impacts: Waterlogging in Salt Lake, Alipore, Behala, and Dum Dum likely.

Advisory: Residents should avoid unnecessary outdoor movement during thunderstorm activity.





CENTRAL & WESTERN DISTRICTS

(East & West Medinipur, Bankura, Birbhum, Purulia, Murshidabad)

Weather: Intermittent moderate rainfall; isolated heavy spells possible in East Medinipur and Murshidabad.

Impacts: Risk of localized flooding and slippery roads.

Advisory: Caution advised while travelling; avoid crossing swollen streams.





NORTH BENGAL & SUB-HIMALAYAN REGION

(Darjeeling, Kalimpong, Jalpaiguri, Alipurduar, Cooch Behar, Malda, Dinajpurs)

Weather: Heavy to very heavy rainfall likely, particularly over Jalpaiguri, Alipurduar, and Darjeeling hills.

Impacts: High risk of landslides, flash floods, and rising river levels.

Advisory: Strict caution for hilly regions; follow evacuation instructions if issued.

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