Southwest monsoon has withdrawn as per schedule: IMD, Pg7.

Key Highlights:

• The India Meteorological Department (IMD) announced the withdrawal of the southwest monsoon.
• The northeast monsoon has simultaneously commenced over southern peninsular India on October 16.
• Regions experiencing the onset of the northeast monsoon include Tamil Nadu, Karaikal, Rayalaseema, and parts of Karnataka, Kerala, and Andhra Pradesh.
• The usual date for complete retreat of southwest monsoon is October 15.

Detailed Insights:

• The simultaneous withdrawal and onset of monsoons were influenced by factors like cyclonic circulation over the Comorin area and easterly winds.
• Since 2020, the withdrawal of the southwest monsoon has coincided with the onset of the northeast monsoon in multiple years.
• This year, Kerala experienced an early southwest monsoon arrival on May 24, against the usual date of June 1.
• The delayed retreat of the southwest monsoon into late October has contributed to the coinciding of monsoon transitions.

Key Concepts Involved:

• Southwest Monsoon: Seasonal winds bringing rainfall to India from the Arabian Sea, typically from June to September.
• Northeast Monsoon: Seasonal winds bringing rainfall to southern India from the Bay of Bengal, typically from October to December.
• Cyclonic Circulation: A large-scale circulation of air around a central area of low pressure, influencing weather patterns.