2010 South-west monsoon is expected to be normal

The amount of rains in monsoon season is always a very important economic indicator every year. This year it will be all the more as we had a severe drought last year and had deficient food production which needs to be replenished. Inflation also will depend on monsoon. India also needs to push agriculture reforms and a better growth will lead to more investments.  And then there are so many connections to monsoons in India – rural income/demand etc.

IMD has released its forecast (HT: India Industry Tracker Blog, a blog by my colleague on indian industry) for south-west monsoon (June-Sep) for 2010. IMD uses a two-stage forecasting strategy for long range forecasting of the south-west monsoon rainfall over the country as a whole. The first long range forecast is issued in April and the forecast update is issued in June.

The industry blog  further explains how IMD categorises rainfall amounts:

The IMD categorises rainfall into various sub-sections:

  • Drought — rainfall less than 90% of the LPA
  • Below normal monsoon — rainfall between 90-96% of the LPA
  • Near normal monsoon — rainfall between 96-104% of the LPA
  • Above normal monsoon — rainfall between 104-110% of the LPA
  • Excess monsoon — rainfall more than 110% of the LPA.

So, the first forecast for 2010 is:

IMD’s long range forecast for the 2010 south-west monsoon season (June to September) is that the rainfall for the country as a whole is likely to be Normal.
Quantitatively, monsoon season rainfall is likely to be 98% of the long period average with a model error of ± 5%. The Long period average rainfall over the country as a whole for the period 1941-1990 is 89 cm.

 For a graphic on India’s monsoon forecast vs actual rain, see this. Need to run some statistics on this.

One Response to “2010 South-west monsoon is expected to be normal”

  1. ramana Says:

    when monsoon sets in andhrapradesh-hyderabad?
    what is expected rain fall during the year?

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