The EPS developed for ERP produces 11 member ensemble forecasts for 25 days lead time at every 5-day interval starting from 16th May to 28th September during 2001-2012.

The atmospheric and oceanic initial conditions are obtained from National Data Centres NOAA Operational Model Archive and Distribution System online model data server (http://nomads.ncep.noaa.gov). The initial conditions have been prepared from coupled data assimilation system (CDAS) with T574L64 GFS based atmospheric assimilation and MOM4 based oceanic assimilation.