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
Two cases of intense western disturbances which affected the northwest India have been investigated using the India Meteorological Department’s operational limited area analysis and forecast system. The model results are compared with the synoptic observations, which have been enriched by additional stations installed under the national project ‘Parwat’. The analysis shows that the 24-hour model forecasts are in good agreement with the observations both in respect of western disturbance’s movement and intensification.
