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Monsoon rains in June-September to be 101% of The Long Period Average (LPA)

  • IASbaba
  • June 4, 2021
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Monsoon rains in June-September to be 101% of The Long Period Average (LPA)

Part of: GS Prelims and GS-I – Geography 

In news

  • According to the India Meteorological Department (IMD), monsoon rains in June-September would be 101% of the Long Period Average (LPA) of 88 cm. 
  • This still constitutes ‘normal’ rainfall, which is from 96-104% of the LPA.

About Long Period Average (LPA) 

  • It is the average of rainfall received over a 50-year period between 1951 and 2001, which is around 89 cm of rainfall.
  • This is kept as a benchmark while forecasting the quantitative rainfall for the monsoon season every year. 

Categories of the rainfall

  • IMD maintains five rainfall distribution categories on an all-India scale:
    • Excess: If the rainfall is more than 110 % of this LPA.
    • Above Normal: If the rainfall is between 104 and 110 % of this LPA.
    • Normal: If the rainfall is between 96 and 104 % of this LPA.
    • Below Normal: If the rainfall is between 90 and 96 % of this LPA.
    • Deficient: If the rainfall is less than 90 % of this LPA.

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