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West north-westwards moving cyclones brings heavy rains normally in Chennai and in TN

Posted on: 25/Nov/2020 9:03:47 AM
The state of Tamil Nadu is now bracing for Nivar and this cyclone is expected to cross the coast as a very severe cyclonic storm. Many storms that moved west north-westwards have brought heavy rains at the time of their landfall and this has been brought out by the records over the last 2 decades.  In the period from 1971 to 2019, nearly 13 systems have crossed Karaikal- Mamallapuram belt in the months of November and December.

It must be recalled that in 1994 a cyclone originated in the same location as cyclone Nivar and yielded good amounts of rainfall. It is revealed that Cyclone Nivar would also be a rain filled storm and is likely to cross south of Chennai around Puducherry. This was mentioned by Mr.  Y. E. A. Raj, a senior meteorologist.

He shed light on Cyclone Nilam that made landfall close to Kalpakkam at the end of October month in the year 2012. This storm was of lesser intensity and caused less damage and it was an exception.

A parallel between Cyclone Nivar and Cyclone Nisha has been drawn by the weather bloggers and by the meteorologists now. It must be noted that this Cyclone Nisha crossed the coast near Nagapattinam taking a similar direction. On 25th November 2008, Cyclone Nisha was formed and it brought heavy rains in some districts like Nagapattinam, Cuddalore etc till 28th of November.

In the past, the slow moving cyclones had given good rains and this was as per the weather blogger Mr. Pradeep John. Like the present system, Cyclone Nisha moved north-westwards and gave 40cms rains in the Chennai city. It is important to note that Chennai city had already received nearly 20cms rains in the last 2 days due to Cyclone Nivar.

In the month of December in the year 2016, Cyclone Vardah made landfall close to Chennai as a very severe cyclonic storm. This cyclone brought good rains in some places on the Chennai outskirts etc. Some weather bloggers threw light on Cyclone Ockhi that formed on 29th November 2017 and it damaged rubber plantations and banana crops in Kanniyakumari. In November 2018, Cyclone Gaja devastated the delta region and battered interior places such as Trichy, Dindigul etc. 

Between 8:30 am and 7pm, Nungambakkam received nearly 11cms of heavy rainfall yesterday. Important information is that the storage in Chennai citys 4 main reservoirs have been monitored closely now by the Water Resources Department or WRD.