The southwest monsoon has reached very close to Kerala-Tamil Nadu. The northern limit of the monsoon is currently about 100 km from the coasts in the Comorin Sea. Now it is expected to knock anytime. Only the standards are waiting to be met.
South-westerly winds have been blowing for the past several days. The monsoon is confirmed to have reached Kerala upon meeting several standards of rain, wind, and radiation. Out of these, a measure of rain has been completed on Friday.
According to the Meteorological Department, 60% of the 14 meteorological centers in Kerala, Lakshadweep, and Karnataka are considered as the main base for the arrival of monsoon if 2.5 mm or more rain is received after May 10 for two consecutive days. This base has been completed by the rains in the coastal areas of Kerala and Karnataka and in Lakshadweep. But the standards of air and radiation are constantly under surveillance.
Monsoon had knocked over the Andaman and Nicobar Islands of India on May 21 and after that, it is moving in a north-westerly direction at a normal speed. The normal date for the onset of the monsoon in Kerala is June 1, but the Meteorological Department had predicted it to arrive on May 31. At the same time, private weather agency Skymet had predicted a monsoon knock on May 30 itself.
The westerly winds start blowing up to a height of about 3 km and so between 55-degree longitude to 80-degree longitude and 10-degree latitude from the equator.
Of this, the wind speed on the surface should be 30–35 km per hour between 70 to 80 degrees longitude and 5 degrees latitude to 10 degrees latitude.
The longwave radiation going up from 70 to 75 degrees longitude and 5 degrees to 10 degrees longitude should be less than 200 watts per sqm.
This time the monsoon is expected to be better than normal. According to Skymet Weather, the average rainfall in India from June to September this year can be 907 mm. The average rainfall during the four months across India is 880.6 millimeters, known as the Long Period Average (LPA).
Skymet runs as an average. That is, this figure of rain is considered to be 100%. There is a possibility of 907 mm of rain this year. In 2021, it is expected to receive 103% rainfall during the monsoon. Rainfall ranging from 96% to 104% is called above normal rainfall. This figure was 110% in 2019 and 109% in 2020. This means that for the third consecutive year, you will get the benefit of a good monsoon.
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