Thursday, August 5: While the southwest monsoon season brings abundant rains to most parts of India, the state of Tamil Nadu tends to be an exception. Due to its location on the leeward side of the western ghats, this southern state falls in the rain shadow region, and therefore, it has to rely on the retreating monsoon season to receive its share of rainfall.
This year, however, Tamil Nadu has been more fortunate in terms of the rain received. The state has recorded above-average precipitation during the southwest monsoon period so far, having received 189 mm rainfall between June 1 and August 5—a 38% ‘excess’ compared to its long-term average for this period (136.5 mm).
But this past week was as good as dry, with just 2.4 mm rain recorded across the state between July 29 and August 4. However, an intensification in rainfall activity is expected over the coming weekend.
Isolated heavy showers on the horizon
As per the India Meteorological Department (IMD)’s regional met centre in Chennai, light rainfall will continue over the Western Ghats districts and the coastal areas of Tamil Nadu on Thursday and Friday.
The spike in rain activity will arrive over the weekend, when a majority of Tamil Nadu’s coastal districts—including the state capital Chennai—will experience moderate rainfall. This short-lasting heavy rain spell will be caused by the northwesterly winds blowing into the coastal areas and creating convergence-based downpour, reports The Times of India.
Isolated heavy falls of over 65 mm, along with thunderstorms, will bombard the districts of Nilgiris, Coimbatore, Theni, and Dindigul. Accordingly, they have all been placed under a yellow watch on Saturday and Sunday, August 7-8, with the advisory urging residents to ‘be aware’ of the local weather situation.
Come Monday, the rain intensity over the four aforementioned districts will downgrade to moderate, while light to moderate showers will continue over the coastal region.
Chennai is forecast to witness thunderstorms and rain till Monday, August 9, and cloudy skies thereafter. However, the wet spell may not provide much relief from the sultry conditions over the coastal city, with daytime temperatures hovering around 36°C and relative humidity of well over 70%.
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