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 30th, 2025

-
INDIAN WEATHER DESK

DAILY DISTRICT WEATHER BULLETIN – WEST BENGAL

Date of Issue: 30.08.2025 (0500 IST)
Valid for 24 hours: 30.08.2025 (05:30 IST) to 31.08.2025 (05:30 IST)




SYNOPTIC OVERVIEW

A well-marked low-pressure area is expected to form over the northwest Bay of Bengal off the Odisha–West Bengal coasts around this time. Light to moderate rainfall is likely over most parts of West Bengal, with active monsoon conditions continuing to prevail.




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 across South Bengal. Thunderstorms with lightning and gusty winds (30–40 km/h) are very likely at one or two places—particularly over North & South 24-Parganas, East & West Midnapore, and Jhargram.

Impacts:

Chances of localized waterlogging in low-lying urban and rural areas.

Reduced visibility possibly affecting traffic and outdoor activities.

Lightning-related risks in open spaces.


Advisory:

Avoid standing under trees or power lines during storms.

Exercise caution when navigating waterlogged roads.






NORTH BENGAL & SUB-HIMALAYAN REGION

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

Weather: Light to moderate rain or thundershowers very likely at many places over North Bengal. Heavy rainfall (7–11 cm) is very likely at one or two locations in Jalpaiguri and Alipurduar. Thunderstorms, lightning, and gusty winds (30–40 km/h) are very likely at one or two places across all districts.

Impacts:

Heightened risk of flash floods and rising river levels.

Landslide-prone regions vulnerable to slope failure.

Poor visibility affecting travel, particularly in hilly routes.


Advisory:

Avoid travel in landslide-prone and unstable areas.

Follow local advisories and seek safe shelter during heavy showers.

Travelers and tourists in hilly areas should remain cautious.






FISHERMEN & COASTAL UPDATE

Following the broader regional advisory, fishermen and marine users should remain alert to squally conditions expected in the Bay of Bengal. With the formation of a low-pressure area in progress, sea conditions are likely to remain hazardous. Fishermen are advised not to venture into deep sea or coastal waters until further notice.



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