One does not get to see கோவையில் ஓர் மழைக்காலம் often when the yearly average for Coimbatore AP is only 59 cms, the lowest among all IMD observatories in Tamil Nadu along with Karur Paramathi and even lower than another typical வானம் பார்த்த பூமி Thoothukudi which gets 63 cms in a normal year. While since the turn of May there has been an increase in thunderstorm activity over the Kongu region the last few days is seeing near daily rainfall over Coimbatore AP
Numerical Models indicate another active day ahead for West Interior Tamil Nadu with the usual suspects, Coimbatore, Nilgiris, along with parts of Erode & Tiruppur among the Western districts in line to receive rains from moderate thunderstorms aided by the prevailing wind induced instability in the atmosphere. Some of the places in South Tamil Nadu as well in the districts of Madurai, Theni, Dindigul & Virudhunagar also could record good spells of afternoon rains while parts of Kanyakumari district along with Kerala could receive monsoon like rains due to prevailing Westerlies.
But how good has been this year for Coimbatore, is it a surprise phenomenon? Without doubts this May has been one of the best years in recent times for the Textile Metropolis with 161 mm already accumulated in the first fortnight. Only 2015 with 189 mm now has more rains during May in the past decade. With 7 rainy days among the first 13 days of May 2018 may be instead of கோவையில் ஓர் மழைக்காலம் it is possibly more apt to say கோவையில் தினமும் ஓர் மழைக்காலம்.
Edit: With inputs from other bloggers who track Coimbatore weather closely just wanted to highlight here, Coimbatore AP is possibly the place with least rainfall in and around Coimbatore. Places closer to the Western Ghats and Northern areas of the city tend to get much better rainfall compared to Peelamedu area. The Private weather station maintained by Ashwin one of the weather bloggers in Vadavalli has recorded 186 mm since the start of May.
Chennai and adjoining parts of North Tamil Nadu could see a slight increase in temperatures today with the suburbs of Chennai likely to see temperatures touch nearly 40°C in places like Avadi, Tiruvallur. Chennai city areas could see maximum temperatures around 36 / 37°C with sea breeze impact helping after mid noon.