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33<br />
By 5th morning, it emerged into southeast Arabian Sea, and lay as a depression<br />
over Laccadives area(Fig. 13.7). As the depression moved into the Arabian Sea,<br />
pressures rose over the south Peninsula. Rainfall continued to be generally<br />
widespread over the whole of south Peninsula and extended into Kerala and Arabian<br />
Sea Islands. Though the rainfall decreased in Tamil Nadu as the depression<br />
moved west, still it was nearly widespread. Some heavy falls still continued<br />
in Coastal Andhra Pradesh and Tamil Nadu and the significant rainfall<br />
amounts were still in the coastal areas. The persistence of the rainfall (with<br />
a few heavy falls) in Coastal Andhra Pradesh even when the depression had moved<br />
into Laccadives is a significant feature to be noted.<br />
13.8 By the next morning (6th), the depression moved further westwards<br />
(Fig. 13.8) and rainfall decreased considerably over the south Peninsula, though<br />
a few moderate falls were still reported from Coastal Andhra Pradesh (Fig. 13.9).<br />
The synoptic situation over the south Peninsula subsequently changed by the formation<br />
of a low pressure area in southwest Bay of Bengal .<br />
13.9 The significant features to be noticed in this sequence are:—<br />
i) While the cyclonic storm was far out at sea, in the Bay of Bengal, generally<br />
northeasterlies prevailed over the south Peninsula and the east-west oriented<br />
trough was also not prominent over the Peninsula. Hence there was no<br />
significant rainfall in the Peninsula except for a few showers in the<br />
extreme south Kerala. Even on 2nd evening when the cyclonic storm was<br />
near 10°N 85°E (only about 5 degrees away from the coast) no significant<br />
rainfall had commenced along Tamil Nadu coast. On 3rd morning also, when<br />
the storm was severe and was close to the coast, the significant amounts<br />
were only along the coastal areas; the interior of Tamil Nadu did not get<br />
much rain. Only when the system moved to interior Tamil Nadu and adjoining<br />
South Interior Mysore on 4th, that Tamil Nadu reported widespread heavy to<br />
very heavy falls. Thus, the extent of rain area ahead of the storm centre<br />
was quite limited, while in the rear, rainfall was extensive and persisted
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