All of Tamil Nadu is now looking for the Trough of Low Pressure in Bay to provide some rains before the year 2016 winds down. Things are getting closer to what could be the final spell of rains in 2016, a year that is likely to be remembered as much as 2015 but for completely contrasting reasons.
With the trough now straddling the SouthEast & SouthWest parts of Bay of Bengal making a gradual west movement towards the Sri Lankan coast rains are likely to hit the coastal parts of Tamil Nadu by mid day tomorrow. As things stand South Tamil Nadu & Delta districts are likely to be the biggest beneficiaries.
It would be prudent to keep the expectations low as the system is expected to drift further W/SW over the next couple of days which could possibly mean the rainfall pattern could also undergo some shift. Nevertheless most parts of Coastal Tamil Nadu will have a spell or two of rains before the year winds down. The rains are expected to peak during the intervening night of 27th & 28th and slow down from the early part of 29th December.
We will have to see if the interior places in West TN like Erode, Coimbatore etc get any benefit from this disturbance. Going by how Numerical Models have been inferring these regions could possibly miss out on any meaningful rainfall activity from this trough of Low pressure. Similarly places to the North of Pondicherry like Chennai could possibly have to be happy with isolated spells of moderate rains during this period.
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