Another Muted Day likely on Temperature front for Chennai

As temperatures started to ease over Tamil Nadu yesterday saw a very good day of summer thunderstorms over interior Tamil Nadu with many places in Vellore, Tiruvannamalai, Salem, Krishnagiri, Erode, Dharmapuri & Coimbatore districts enjoying good rains.  Along with Interior Tamil Nadu adjoining parts of Andhra & Karnataka also saw summer thunderstorms lash the region.  Coimbatore Airport recorded 15 mm rains while the IMD observatory in Bengaluru which was missing out on rains for so many days now scored 29 mm until midnight.

While Chennai could feel aggrieved it is missing out on all the rains which is happening in the interior parts of Tamil Nadu we could certainly take solace on seeing the back of the heat wave that was holding us to ransom for the better part of last week.  Yesterday saw the coolest day in a week for both observatories as Chennai Nungambakkam dipped into low 36 while Meenambakkam dipped into low 38.  Though the high humidity during the late evening made it an uncomfortable day.

There is more good news on the temperature front as today also temperatures are expected to stay near normal for most parts of the state and in particular North Coastal areas of Tamil Nadu could see temperatures possibly stay lower than normal under the influence of early sea breeze with Chennai possibly seeing another 36 / 37°C day today as well.  While models are estimating humidity to be low be prepared otherwise as like yesterday humidity during evening could be high on account of early sea breeze.

Interiors of Peninsular India could see another day of good rains today as well on account of convective thunderstorms developing along the areas seeing some convergence of winds.  Compared to yesterday the thunderstorms could possibly be little more to the West with South Interior Karnataka districts like Mysore / Hassan / Madikeri possibly enjoying the better spells.

Parts of West Interior Tamil Nadu districts like Coimbatore, Nilgiris,Erode could see another day of thunderstorms if things go right along with North Kerala districts which are likely to see a good day of pre monsoon thunderstorms auguring well for the onset of Southwest Monsoon.

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Hot Days Streak Eases for Chennai, Near Normal Trend to Continue

The Hot Days streak for Chennai and coastal areas of North Tamil Nadu eased yesterday as both the observatories recorded sub 40°C for the first time since 13th May 2017.  While Nungambakkam recorded 38.1°C the airport observatory at Meenambakkam was slightly hotter at 39.8°C falling just short of the 40°C which is classified as the threshold for Hot Days.  Even interior places like Tiruttani, and Vellore recorded lower temperatures with Tiruttani settling at less than 43°C for the first time since 13th May.

Things are expected to continue in similar fashion for the coming days as well with numerical models indicating most of Tamil Nadu expected to see temperatures closer to normal in the coming days.  During the early part of last week we had a trough running from Coastal AP & South TN along the coast increasing the strength of Westerlies thereby creating heat wave conditions for most of Peninsular India East Coast. With large scale synoptic changes slowly evolving over North Indian Ocean in the form of possible Upper Air Cyclonic Circulation over Bay of Bengal near Andaman Islands things could take a backseat on the heat front.

Temperatures are likely to be slightly on the higher side today for North Interior Tamil Nadu and parts of South Tamil Nadu but things are expected to ease and get closer to normal most of this week as one can surmise from the 7 day temperature anomaly charts.  Parts of Coastal AP is going to get much needed relief from the oppressive heat wave that has engulfed the region for almost 10 days now.

On the rain front parts of West Interior Tamil Nadu and adjoining parts of Kerala could see moderate rains at a few places with some light rains possible as well in parts of Rayalaseema & Telengana where there could be a temporary wind confluence triggering instability.  Coimbatore, Erode, Nilgiris & Tiruppur districts could be the beneficiaries of today’s spell of rains.

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Heat & Thunderstorms to light up many places of Tamil Nadu

While Summer heat has been relentless in its grip over Tamil Nadu particularly in the North Tamil Nadu areas, the solace has been the evening thunderstorms that have been giving some good rains to the interior places.  In particular the places to the West & Southwest of Chennai around Vellore, Tiruvannamalai & Krishnagiri districts seem to enjoy the best of the spells and yesterday was no different as well.  Yercaud recorded a whopping 93 mm in all last night of which 51 mm possibly fell in one hour.  Similarly Madurai, Nilgiris, Dindigul along with parts of Coimbatore / Tiruppur also recorded good rains.

On the heat front while there is no across the board respite yet for Tamil Nadu the city areas of Chennai though got some relief with the 40°C streak ending yesterday with early sea breeze keeping the temperature under check.  Meenambakkam along with rest of Southern & Western Suburbs though did not see any respite as it was 6th straight day of 40°C.

Things look all set for another day of heat over Tamil Nadu with once again North Tamil Nadu being the hottest area in the state with possibly Tiruttani all set for 4th straight day of 44°C temperatures while places closer to the coast could benefit from sea breeze.  Chennai could possibly see the day high stay around 40  /41 °C while Meenambakkam and rest of the suburbs will possibly a degree or so hotter due to the late advent of sea breeze.

We are likely to see another day of thunderstorms over the interiors with two particular hotspots over Tamil Nadu, along the Western Ghats and parts of Tiruvannamalai, Cuddalore & Vilupuram districts.  One or two places in Trichy and adjoining delta districts could also see isolated spells of moderate to heavy rains.


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Oppressive Conditions to continue for North Tamil Nadu

The oppressive heat wave conditions prevailing over North Tamil Nadu and Coastal Andhra Pradesh shows no signs of relenting as both Chennai observatories scored 5th straight day of 40°C though the city areas enjoyed respite from early sea breeze around 12 PM keeping the temperatures lower compared to Thursday.  No such luck for Southern and western suburbs where temperature remained high well into the afternoon with Meenambakkam seeing its 3rd straight 42°C

While rest of Tamil Nadu saw some reduction in day time temperatures thanks to overnight thunderstorms which gave good rains to the interiors no such luck for North TN which continues to see oppressive conditions along the coast with Pondicherry seeing its 3rd straight 42°C day yesterday.  Places like Trichy, Karur, Salem all saw very comfortable weather under the influence of more moisture in the air and stronger dead west winds.

The east coast of Peninsular India will continue to see oppressive conditions with abnormally hot weather continuing under what is likely to be fairly clear sky today compared to yesterday.  Add to it the stiff Westerlies that has been seen from early in the morning pointing to a fairly hot day ahead for North Tamil Nadu around the coastal areas and adjoining parts of South AP.  Unlike Thursday due to lesser spatial spread of thunderstorms yesterday we could see once again more places inching towards the 40 mark.

We can expect Chennai Nungambakkam inch closer to 42 with possibly 4  / 5 degrees above normal while Meenambakkam could cross 43 once again if the sea breeze gets delayed though the good news is models are estimating sea breeze to be strong and reach just before noon.  Like Thursday we can see temperatures run away like Usain Bolt early in the morning.


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