Heavy rains lashing Kerala due to depression
Kochi: The major reason behind the incessant rains and flash flooding in Kerala is depression. The meteorological experts said that such an intense version of depression occurs rarely.
Cochin University of Science and Technology (CUSAT) Radar Centre director K. Mohan Kumar said that Kerala is witnessing an active phase of the rains presently, which is why the that monsoon began in June is continuing to maintain its intensity even now.
The depression channel formed in the Arabian Sea results in the heavy rains. Depression channels are normally formed during monsoon and will continue to exist from seven to 10 days. The increase or decline in rainfall depends on the intensity of the depression.
As per the normal trend observed for years, the rain seems to remain intense for the initial days of June and then declines gradually. Later, the rain will again intensify in July and will continue till September with varied intensity. But the downpour has been persisting from June to August.
The rain was less intense for the past 10-15 years. He added that 25-30 percent excess of rain was received this year. Normally, the rain will decline in Kerala as the depression moves from south to north. But the depression seems to remain in south this time.
The northern districts usually get the rain as part of the southwest monsoon. When the nature of southwest is observed, it can be seen that the rain intensifies as it moves northwards. If the average rain during southwest monsoon is gauged, it can be seen that the rain in Kollam is more than that in Thiruvananthapuram.
Thiruvananthapuram Meteorological Centre director K. Santhosh said that heavy rains are likely in Kerala for five more days. Gusty wind also is expected. The fishermen were warned not to venture out into the sea on the basis of this prediction, he added.