On Set of Monsoon

Subject: Geography

Context:

Monsoon has arrived in Kerala and the India Meteorological Department (IMD) has announced that the normal onset of monsoon has begun with most of Kerala being now covered under monsoon as of 1 June 2020

Concept:

• The normal date of onset of the southwest monsoon over Kerala i.e. the first place of entry in the mainland of India is 1st June.
• The monsoons advance quickly accompanied with a lot of thunder, lightning and heavy downpour. This sudden onset of rain is termed as monsoon burst.
• Sometimes monsoons are delayed or they come much earlier than normal.
• Normally the onset occurs between 29th May and 7th June.
• The earliest onset was on 11th May in 1918 and 1955, while the most delayed onset was on 18th June in 1972.