After Cyclone Gaja, Southern Peninsular is gearing up for another powerful system. Right after the passage of Gaja, another Cyclonic Circulation had developed over southeast Bay of Bengal and equatorial Indian Ocean that soon induced a low-pressure area over Southeast Bay of Bengal.
The low-pressure area has now further intensified into a well-marked low-pressure area and lies over Southwest Bay of Bengal. Moving in westwards, it is expected to reach Tamil Nadu coast by tonight.
As a result, we can expect moderate rains with one or two heavy spells over the main districts of Tamil Nadu. The rains are expected to continue up till November 22.
As per weathermen, initially the intensity of rains will be more over coastal areas including Chennai. Eventually, this rain belt will shift its base to interior parts of Tamil Nadu as well. By November 23, this weather system will weaken and rains might fade away.
Therefore, weather will once again become dry, however, occasional light rains may continue. Chennai is also expected to receive moderate rains with isolated heavy spells during this period. Thus, it will not be wrong to say that the second half of November is turning out to be good for Tamil Nadu in terms of precipitation.
According to weathermen, a well-marked low-pressure area is that area in the atmosphere in which the pressure is lower than those of the surrounding region at the same level and is represented on a synoptic chart by a system of one closed isobar (wind speed on the surface < 17 Knots (Knots) when the system is at sea or one closed isobar in the radius of 3 Degrees from the centre over land).
The Cyclone Season for India is usually between April and December, whereas months of May and November are usually the most active months. Recently, Tropical Cyclone Gaja gave heavy to very heavy rains over South Peninsular region. Currently, this system has intensified into a deep depression lying over Arabian Sea.
Image Credit: Conde Nast Traveller
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