Both Kerala and Tamil Nadu have been witnessing on and off pre-Monsoon activities for the last many days. While the frequency of rains over Kerala is more, rains over Tamil Nadu are comparatively less frequent.
In terms of spread also, most parts of Kerala were registering rains. Meanwhile for Tamil Nadu, it was mainly the districts lying in close proximity to Kerala that were witnessing some showers. On the contrary, the coastal stations were mainly dry.
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During the last 24 hours, along with widespread rains over Kerala, even the southern coastal stations of Tamil Nadu got to observe light to moderate rains. Within the span of 24 hours from 08:30 am on Monday, Tondi recorded moderate rains to the tune of 33 mm, Karaikal 13 mm, Kozhikode 8 mm, Tuticorin 7 mm, Kochi and Alappuzha recorded 5 mm of rains each, and Punalur witnessed mere 1 mm of rains.
In general, also, during the pre-Monsoon season, the frequency of rain is much more over Kerala whereas, Tamil Nadu is situated in a rain-shadow area, mainly gets scanty rains.
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As per Skymet Weather, a trough is extending from Madhya Maharashtra to Comorin area across Interior Karnataka and Interior Tamil Nadu. In the wake of this, we expect light to moderate rains to continue over Kerala for another 48 hours.
These rains would affect the districts such as Kochi, Karaikal, Kozhikode, Kannur, Tuticorin, Palayamkottai, Thanjavur, Tuticorin, Kodaikanal, Alappuzha, and Tiruchirapalli. Whereas, Chennai is likely to remain dry.
Few interior and south coastal districts of Tamil Nadu may also receive few spells of rains. However, due to the absence of any significant weather system, the north coastal districts of Tamil Nadu would have to manage with partly cloudy skies only as rains are not foreseen for this part of the state.
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Any information taken from here should be credited to skymetweather.com