The 2009 southwest monsoon recorded the third highest deficient
all India southwest monsoon season rainfall (-22% of LPA) during
the period 1901-2009. All the monsoon months except July
recorded large deficient rainfall. Region wise, except south
Peninsula, all other homogeneous regions recorded much below
normal rainfall. Activity of depression was below normal with
shorter track and life span. Both statistical and dynamical models could not foresee the observed large rainfall deficiency during the season. This monsoon monograph has 10 chapters each of which presents and discusses various important aspects of the 2009 southwest monsoon season including observed regional and
global features during the season.