Northeast Monsoon rainy season set to conclude by end December!
Posted on: 16/Dec/2019 2:17:42 PM
The Meteorological Centre has informed that that northeast monsoon rainy season which commenced during the start of October is all set to conclude by the end of December.
Generally, the average expected rainfall in Tamil Nadu during the northeast monsoon rainy season is 44 cm. Further, considering the water received from rains, the largest quantum of rains are expected in Tamil Nadu only during the Northeast Monsoon Rainy Season.
As such, especially the agriculturists eagerly look forward to this rain. Generally, the northeast monsoon seasonal rains start either before 20th October or immediately later.
As for this year, the northeast monsoon rainy season commenced in Tamil Nadu by 16th October. During the 1st half of the monsoon seasonal rains, there were widespread rains throughout Tamil Nadu.
Later, from the start of November, there were no appreciable rains. This led to the question of whether Tamil Nadu will receive the expected rainfall!
In this scenario, a very heavy widespread downpour occurred throughout Tamil Nadu on 28th, 29th, and 30th November and 1st, 2nd, 3rd of December.
Out of this, on the single day of 1st December alone, there was a recorded average rainfall of 4 cm!
Subsequently, the rains abated a little. It rained to a certain extent on 13th and 14th December.
As on 14th December, a maximum rainfall of 9 cm was recorded at Trichy District Nandhiyar water resource.
Due to the climate situations such as the frequent development of cyclonic formats in the upper layers of the atmosphere over the Bay of Bengal, the formation of low-pressure zones ad cyclones, Tamil Nadu has been receiving copious rains in this northeast monsoon rainy season.
In this regard, most of the rainfall received may be attributed to the cyclonic formats developed in the upper layers of the atmosphere over the seas.
Apart from this, there have been no major occurrences such as low-pressure zones, depression areas, and cyclones during this year’s northeast monsoon rainy season.
It is remarkable that Tamil Nadu has received the average expected rainfall this year in spite of the above-mentioned non-occurrences!
The state has managed to meet the average expected level just as a few days remain for the conclusion of the northeast monsoon rainy season.
As per expectations,s, Tamil Nadu should have received 41.3 cm rainfall. Actually, it is quite remarkable that rainfall of 44.2 cm has been recorded! This is in excess of the expected average rainfall.
Having a district-wise review, 12 districts have received excess rains. Out of this, Niligir district has received the highest quantum. It has rained 74% more than the average expected rainfall.
Next in this list come Ramanathapuram, Tirunelveli, and Thoothukkudi districts.
As regards the districts which received rather fewer rains, Vellore and Perambalur are 2 of the districts. They received 29% less rainfall.
As for the Chennai district, it has received 13% less rain as compared to the average expected rainfall.
