During 1932-1988, forecasts for southwest monsoon seasonal rainfall were issued for NW India andPeninsula. These forecasts are prepared based on linear multiple regression models, which were updated/modified from time to time.
During 1989 to 2010, the forecasts for the southwest monsoon seasonal rainfall over the country as a whole were issued based on power regression models:
Performance of Operational Forecasts (1989 TO 2010) for the SW Monsoon Seasonal (June to September) Rainfall for the Country as Whole