An analytical study of rainfall pattern over Chennai

The spells of daily rainfall received at Nungambakkam and Meenambakkam observatories located in Chennai for ten year period have been analysed. study reveals that the three distinct patterns with February March having negligible while April to September being 15 20 percent from October January very high values. occur during southwest monsoon season are consistency occurrence evening, night early morning where as northeast equally spread whole day. Frequency one or two per day is more months September. There significant increase value December. In June than 65 rainy days, duration a less 2 hours December percentage below fifty. number amount millimeters about 55 throughout year. intensity rain 7 hour ranges 60 70 all except month March.