LONG PERIOD AVERAGE (LPA)

Aug. 4, 2018

Acc. to India Meteorological Department (IMD) forecasts, Monsoon rains in the months of August and September 2018, would be 95% of the LPA (Long Period Average), thus anticipating less rain.

About:

The monsoon is considered normal if average rainfall is between 96% and 104% of the Long Period Average (LPA).
LPA is the averages of rainfall received over a 50-year period between 1951 and 2001. This average comes to 89 cm of rainfall.

LEVEL OF RAINFALL	CRITERIA
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.

Source : The Hindu

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