The Figure shows the rainfall distribution in April 2003 .  There was a general decline in rainfall amounts over the western parts of the southern sector though significant rainfall (40-100 mm) was sustained over the western parts of the southern sector. The decline signified the start of the gradual withdrawal of the summer rainfall season over the sector. The eastern parts of the sector recorded low rainfall that fell below 40 mm. 

A significant pick up in rainfall was observed over the equatorial sector with most locations experiencing rainfall in excess of 40 mm. This was indicative of the establishment of the long rains season over the sector. However, the bulk of the rainfall was observed in the second half of the month. Rainfall exceeding 100 mm was recorded over much of Kenya, southern Uganda and northwestern Tanzania. Low rainfall amounts prevailed over southeastern and coastal areas of Kenya as well as northeastern Tanzania to signify a further delay in the onset and possible failure of the long rains season. The northern sector remained generally dry as is characteristic of April. However, rainfall in the range 40 - 200 mm occurred over the Ethiopian highlands for the third consecutive month.