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 25th, 2025

-

INDIAN WEATHER DESK

DAILY DISTRICT WEATHER BULLETIN – WEST BENGAL

Date of Issue: 24.08.2025 (1200 IST)
Valid for 24 hours: 25.08.2025 0530 IST to 26.08.2025 0530 IST




SYNOPTIC OVERVIEW

As of 21 August 2025, meteorological data indicates the likely formation of a low-pressure area over the northwest Bay of Bengal off the Odisha–West Bengal coast around 25 August . Under its influence, light to moderate rain/thundershowers are very likely over South Bengal, while fairly widespread to widespread light to moderate rain is expected across North Bengal during this period .




SOUTH BENGAL CLUSTER

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

Weather: Light to moderate rain or thundershowers likely at many places. Thunderstorms, lightning, and gusty winds (30–40 km/h) expected at some locations .

Impacts: Potential for localized waterlogging, reduced visibility, traffic disruptions, minor crop or horticultural damage, and risk of lightning—especially in open areas .

Advisory:

Avoid travel through water-clogged roads and under unsafe shelters (like trees/electric poles).

Manage drainage in agricultural zones; stay alert during lightning risk periods. .






NORTH BENGAL & SUB-HIMALAYAN REGION

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

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

Impacts: Potential for minor waterlogging, reduced visibility, and disruptions—especially under thunderstorms or lightning.

Advisory: Avoid standing near isolated trees or water bodies during storms; exercise caution in traffic and outdoor activity.




FISHERMEN & COASTAL UPDATE

Previous forecasts predicted squally weather with winds of 40–50 km/h (gusting to 60 km/h) along and off the West Bengal coast and North Bay of Bengal during this period . Mariners and coastal communities should remain cautious and avoid venturing into rough seas.



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