With Southwest Monsoon ending On September 30, now its turn for Northeast Monsoon to come in.
The Northeast Monsoon season is one of the most important seasons for the state of Tamil Nadu. In fact, the monthly rainfall disturbance during this season is as follows – October receives 180.2 mm of rain, followed by November at 170 mm and December ending with 88 mm of rain.
Thus, we can say that during this season the state receives about 50% of its annual rainfall activity. The commencement of Northeast Monsoon over Tamil Nadu also takes places during second of October, but rains pick up pace since the beginning of this month.
The winds also change their direction and start blowing from the east. Moreover, as Tamil Nadu lies in the proximity of the coast, warm and moist winds directly blow over the state increasing the humidity levels. Thus, we cay that this combination leads to good rains over Tamil Nadu.
Currently, a cyclonic circulation lies over Southwest Bay of Bengal and adjoining region. On account of this system, since the last few days rainfall activity is going on in Tamil Nadu. Not only this, moderate to heavy showers have been seen over some parts of the state in the last 24 hours time.
In the last 24 hours from 8:30 am on Monday, Coonoor recorded 72 mm of rains, Yercaud 22 mm, Tuticorin 16 mm, Kodaikanal 13 mm, and Coimbatore 9 mm while light showers were seen at Chennai to the tune of 2 mm,
Further, around October 5, rains are likely to pick up pace, as a system possibly in the form of low-pressure area is likely to form over North Coastal Tamil Nadu and adjoining Southwest Bay of Bengal.
In wake of this, we can say that between October 7 to October 9, heavy rains are expected over the state. However, rain intensity will more over the northern parts as compared to the southern parts of the state.
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