An important characteristic of Northeast Monsoon is that it never procures an absolutely dry period as patchy location specific rain continues throughout the period. Another notable feature is that, weather systems formed during the Northeast Monsoon season are generally very slow moving. Unlikely the ones that develop in the Southwest Monsoon, they sometimes stagnate and invariably last for about 4 to 5 days.
Accordingly, the low pressure area over southwest Bay of Bengal and adjoining areas of Sri Lanka and equatorial Indian Ocean persists. The system has brought heavy rain over Sri Lanka in last 24 hours. The Indian states of Kerala and Tamil Nadu also received some rain.
Rainfall received on Wednesday-
Sri Lanka- Vavuniya 132 mm, Pattuvil 125 mm, Batticaloa 64 mm, Trincomalee 52 mm.
Tamil Nadu- Pamban 6 mm, Nagapattinam 1 mm, Kraikal 2 mm,
Kerala- Thiruvananthapuram 2 mm and Kochi traces of rain.
According to Skymet Meteorology Division in India, rain will continue in southern parts of Peninsular India till November 30. The system will bring good showers over Tamil Nadu on November 28 and heavy rain on November 29. Post that, the system will move towards Kerala, Lakshadweep and Comorin region but with reduced intensity. The system will remain over Tamil Nadu and southwest Bay of Bengal for next 48 hours.
This spell of rain in South India is expected to make up for large rain deficiency in several parts of Tamil Nadu. The average rainfall for Chennai in November is 407 mm, but the city has received only 170 mm of rain so far. The fresh spell of rain will push up the rainfall figure in the city.
