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 forecast — August 2nd, 2025

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                                            INDIA WEATHER DESK

DAILY DISTRICT WEATHER BULLETIN – WEST BENGAL
Date of Issue: 01.08.2025 (1700 IST)
Valid for 24 hours: 02.08.2025 0530 IST to 03.08.2025 0530 IST




SYNOPTIC SITUATION (as of 01.08.2025, 2200 IST):

The monsoon trough at mean sea level continues to run close to its normal position and is passing through Rajasthan, Madhya Pradesh, Jharkhand, and Gangetic West Bengal.

A cyclonic circulation lies over coastal Odisha and adjoining northwest Bay of Bengal extending up to mid-tropospheric levels.

Moisture incursion from the Bay of Bengal is strong over southern parts of West Bengal due to southwesterly winds.

No significant low-pressure area has formed in the Bay of Bengal, but model guidance indicates possible consolidation of cyclonic circulation over north Bay in the next 3–4 days.



DISTRICT-WISE WEATHER FORECAST FOR 02.08.2025



Kolkata, Howrah, Hooghly, North & South 24 Parganas

Weather: Generally cloudy sky. Moderate to heavy rain with thunderstorms likely at many places.

Warnings:

Thunderstorm with lightning and spells of heavy rain in afternoon and evening.

Local waterlogging possible in Kolkata, Bidhannagar, Behala & Howrah.


Rainfall Probability: Very Likely (75–100%)

Max Temp: 31–33 °C | Min Temp: 26–28 °C

Wind: Southwesterly 15–25 km/h, gusting to 40 km/h in coastal zones.





 East & West Medinipur, Birbhum, Bankura, Murshidabad

Weather: Cloudy to overcast skies. Moderate rain at many places; isolated heavy rainfall.

Warnings:

Localized flooding risk in rural zones of East Medinipur and Bankura.

Slippery roads and reduced visibility during thunderstorm activity.


Rainfall Probability: Likely to Very Likely (60–80%)

Max Temp: 30–32 °C | Min Temp: 25–27 °C

Wind: Light to moderate southwesterlies.




 Northern Districts (Malda, Uttar & Dakshin Dinajpur, Jalpaiguri, Alipurduar, Cooch Behar, Darjeeling, Kalimpong)

Weather: Partly cloudy to mostly cloudy sky. Light to moderate rain at several places; heavy rain likely in foothills and tea garden areas.

Warnings:

Landslide-prone areas (Darjeeling & Kalimpong) to stay alert.

Fog and reduced visibility in hilly zones in morning hours.


Rainfall Probability: Likely (50–70%)

Max Temp: 27–31 °C | Min Temp: 21–24 °C

Wind: Light variable winds with localized gusts in thunderstorms.


 

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