Initially a cyclonic circulation over southwest Bay of Bengal off Sri Lanka coast was responsible for good rains over Sri Lanka. Now a low pressure area has developed over eastern part of the country, which will continue to give good rains for next 24 hours.
Thereafter, the low pressure area will move in a north-northwesterly direction. The low pressure system will gradually intensify into a well-marked low pressure and will move away from Sri Lanka. Therefore rain will reduce after 24 hours. In a span of 24 hours from 8:30 am on Sunday Batticaloa received 149 mm of rain, Nuwara Eliya 13 mm, Kurunegala 12 mm, Pottuvil 11 mm and Tainwmalee 3 mm.
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