Spatial distribution of convective clouds in north India

Radar data of precipitation echoes from convective clouds, in the Delhi region during the monsoon season of 1977 have been analysed mainly to study the distribution of the spacings of the nearest neighbouring cloud pairs, commonly referred to as nearest neighbour spacings (NNS) and their relationship with the effective cloud radii. Frequency distribution of the nearest neighbour spacings tended to be lognormally distributed. Nearest neighbour spacings have been found to be linearly dependent on the effective cloud radii, suggesting thereby that small clouds tend to come closer to one another and form cloud clusters.