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

-
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...
Post a Comment

West Bengal Weather Daily Bulletin — August 28th, 2025

-
INDIAN WEATHER DESK

DAILY DISTRICT WEATHER BULLETIN – WEST BENGAL

Date of Issue: 28.08.2025 (0500 IST)
Valid for 24 hours: 28.08.2025 (05:30 IST) to 29.08.2025 (05:30 IST)




SYNOPTIC OVERVIEW

A well-marked low-pressure area persists over the northwest Bay of Bengal off the Odisha coast, with cyclonic circulation extending up to 7.6 km above mean sea level. This system is expected to move west-northwestwards, continuing to influence moisture flow and weather activity across West Bengal.




SOUTH BENGAL CLUSTER

(Kolkata, Howrah, Hooghly, North & South 24-Parganas, East & West Midnapore, Jhargram, Bankura, Birbhum)

Weather: Light to moderate rain or thundershowers very likely at many places, with thunderstorms, lightning, and gusty winds (30–40 km/h) very likely at one or two places.

Impacts: Potential for localized waterlogging, reduced visibility, and lightning-related hazards.

Advisory: Avoid open areas (like under trees or power lines) during thunderstorms and exercise caution when traveling in waterlogged zones.





NORTH BENGAL & SUB-HIMALAYAN REGION

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

Weather: Light to moderate rain or thundershowers very likely at most places. Heavy rainfall (7–11 cm) is very likely at one or two locations—specifically in Alipurduar, Cooch Behar, Kalimpong, and Jalpaiguri. Thunderstorms, lightning, and gusty winds also likely at isolated places.

Impacts: Risk of flash floods, landslides, elevated river levels, and visibility impairment in hilly terrain.

Advisory: Avoid travel in landslide-prone areas, stay indoors during storms, and follow local updates or evacuation instructions if issued.





FISHERMEN & COASTAL UPDATE

Squally weather with surface winds of 35–45 km/h (gusting to 55 km/h) is expected along and off the Odisha and West Bengal coasts—from 27 to 28 August. Sea conditions will be rough to very rough. Fishermen are advised not to venture into deep-sea areas.




ADVISORIES & PUBLIC SAFETY

Yellow Alert in force across both South and North Bengal for heavy rain, thunderstorms, gusty winds, and lightning.

Precautions:

Stay indoors during thunderstorm activity.

Avoid open areas or low-lying routes.

Be alert to signs of landslides in hilly areas.

Fishermen and marine users should defer activities due to hazardous sea states.


Comments

Post a Comment

Popular posts from this blog

West Bengal Weather Forecast – August 1, 2025

-
Image
West Bengal Weather Forecast – August 1, 2025 Date:- August 1st 2025 Time of Issue: 23:30 IST 31st July Issued by:- Kritajno Bhattacharya  Synoptic Situation : Monsoon flow remains active over Gangetic West Bengal with moderate moisture incursion from the Bay of Bengal. Conditions are favourable for development of isolated thunderstorm cells, especially over South Bengal districts during late afternoon to evening hours. District-wise Forecast for 01.08.2025 (Valid for 24 Hours) South Bengal : Kolkata, Howrah, Hooghly, North & South 24 Parganas: Weather: Scattered moderate to heavy rain/thundershowers likely, particularly between 1600 and 2000 hours IST. Max Temp: 31–32°C | Min Temp: 26°C Wind: Light to moderate southwesterly, gusty during thunderstorm activity. Warning: Possibility of temporary waterlogging in urban low-lying areas. East & West Medinipur: Weather: Light to moderate rain very likely. Isolated pockets may receive brief heavy spells. Max Temp: 32–33°C | Min Te...
Read more

The Role of Atmospheric Gravity Waves in Global Climate Dynamics and Extreme Weather Events

-
Image
The Role of Atmospheric Gravity Waves in Global Climate Dynamics and Extreme Weather Events Written by: Kritajno Bhattacharya Abstract Atmospheric gravity waves are an essential yet often overlooked component of Earth's weather and climate system. These waves, generated by disturbances such as mountains, thunderstorms, and jet streams, play a critical role in transferring energy and momentum across different layers of the atmosphere. Their influence extends from local weather patterns to global climate regulation. This paper explores how atmospheric gravity waves affect phenomena such as monsoons, sudden stratospheric warmings, the polar vortex, and extreme weather events. The paper also discusses how improving our understanding and modeling of these waves can enhance climate predictions and disaster preparedness  1. Introduction to Gravity Waves Atmospheric gravity waves are oscillations within the Earth's atmosphere that occur when air is displaced from a state of...
Read more

West Bengal Weather Bulletin — September 11th, 2025

-
Image
                                          INDIAN WEATHER DESK              WEEKLY DISTRICT WEATHER BULLETIN – WEST BENGAL ___________________________________________________________________________ Date of Issue: 10.09.2025 (0500 IST)  Valid Period: 11.09.2025 to 19.09.2025 SYNOPTIC OVERVIEW A low-pressure area is expected to form over the northwest Bay of Bengal around 13th September, which may enhance rainfall activity across West Bengal. Active monsoon conditions are likely to continue, bringing light to moderate rainfall to most districts. Isolated heavy rainfall is possible over southern and sub-Himalayan districts, especially around 13th–15th September. Expect thunderstorms, lightning, and gusty winds (30–40 km/h) at isolated locations during heavy showers. SOUTH BENGAL ( Kolkata, Howrah, Hooghly, North & South 24-Parganas, East &...
Read more