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 23rd, 2025

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INDIAN WEATHER DESK

DAILY DISTRICT WEATHER BULLETIN – WEST BENGAL

Date of Issue: 22.08.2025 (1200 IST)
Valid for 24 hours: 23.08.2025 0530 IST to 24.08.2025 0530 IST



 SYNOPTIC OVERVIEW

As of 22.08.2025, a low-pressure area persists over the northwest Bay of Bengal, extending its influence across Gangetic West Bengal. This system continues to draw significant moisture into the region, leading to widespread rainfall and thunderstorm activities. The India Meteorological Department (IMD) has issued a Yellow Alert for heavy rainfall across West Bengal, with the possibility of isolated very heavy rainfall in certain districts.  




 SOUTH BENGAL CLUSTER

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

Weather: Moderate to heavy rainfall throughout the day, with thunderstorms likely between 11:00 AM and 3:00 PM. 

Impacts: Possible waterlogging in low-lying areas such as Salt Lake, Dum Dum, and Behala. 

Advisory: Residents are advised to stay indoors during peak thunderstorm hours and avoid travel in waterlogged areas. 




CENTRAL & WESTERN DISTRICTS

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

Weather: Moderate to heavy rainfall expected, with isolated thunderstorms. 

Impacts: Localized flooding in low-lying areas; caution advised during travel. 

Advisory: Stay updated with local weather alerts and avoid crossing flooded roads. 





 NORTH BENGAL & SUB-HIMALAYAN REGION

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

Weather: Heavy to very heavy rainfall likely, especially in the Alipurduar–Jalpaiguri belt. 

Impacts: Potential for flash floods and landslides in hilly areas; river levels may rise. 

Advisory: Residents in flood-prone areas should remain alert and follow evacuation orders if issued. 




 ADVISORIES & PUBLIC SAFETY

Yellow Alert: Issued for all districts of West Bengal for heavy rainfall. 

Orange Alert: Issued for western districts 

Red Alert: nil. 


Precautions:

Avoid outdoor activities during thunderstorms. 

Secure loose objects that could become projectiles in strong winds. 

Stay informed through local news and official weather updates. 




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