A man holding an umbrella walks on a bridge in the rain on a foggy morning in Vellayani, Thiruvananthapuram, Monday, May 30, 2022. (PTI)

The southwest monsoon has reached Kerala three days before its normal start date of June 1. According to Indian Meteorological Department (IMD) records, this is only the fourth time since 2010 when the monsoon has arrived earlier. normal.

What does “the beginning of the monsoon” mean?

The onset of the monsoon over Kerala marks the beginning of the 4-month southwest monsoon season – June to September – in India, which brings in more than 70% of the country’s annual rainfall. This marks an important date in India’s economic calendar.

According to the IMD, the onset of the monsoon marks a significant shift in large-scale oceanic and atmospheric circulations in the Indo-Pacific region, and the IMD announced it only after a year. number of newly defined and measured parameters, adopted in 2016, are met. . In general, IMD tests the consistency of precipitation over a defined geographical area, wind strength and speed.

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