North-east monsoon has logged in the Indian peninsula through the southern tip, according to the Meteorological Department. Though it is over a week after the retreat of the south-west monsoon, the north-east monsoon has registered its presence with the easterly wind strengthening with a depth up to 1.5 km above mean sea level, fanning out rainfall over Tamil Nadu, Kerala and coastal Andhra Pradesh, simultaneously.
Two low pressure systems have been in action. There is one west of Lakshadweep, lurking over the Arabian sea. The other one is near the Sri Lanka coast. “These have been preparing the atmosphere for the onset of North East monsoon,” K Santhosh, director, Meteorological Centre, Thiruvananthapuram, told FE.
The Met department, which has predicted an “above normal” rainfall from north-east monsoon, assures that the delay in arrival is not a matter of worry. Last year, the exit of south-west monsoon and entry of north-east monsoon was almost simultaneous. Within the last two decades, the north-east monsoon has set in as late as November 2 in 1992 and 2000.
Kerala, Tamil Nadu, Karnataka and South Andhra Pradesh are expected to receive ample rain from the surge of easterly winds. While Thiruvananthapuram received as high as 19 mm rainfall in last 24 hours, in Kanyakumari, this has been as high as 24.5 mm.
The depression over East Arabian Sea would intensify into a deep depression and further into a tropical cyclone in the next two to three days, but away from the Indian coast.
In Kerala, fishermen have been advised to be on guard while foraying into the sea along and off the Lakshadeep coast. Rain or thundershowers are predicted at various parts in South India in the next seven days.