Rare UAC rains from Sea for Chennai and Heavy rains for Kerala, Valparai, Kanya, Theni & Nilgiris


As you can see a rare UAC near Tamil Nadu in July end, the last time this happened was in July 2007. So almost after 13 years, we might see UAC rains in July for Chennai. The most interesting part even though UAC will be there we get only rains from land side and this time the UAC is perfectly located such that clouds are moving from sea side in July into Chennai city that too in SWM. Earlier Delta belt got smashed with clouds moving from sea side like north east monsoon. So an exciting day for Chennai with people getting awake to monsoon like day with morning rains.

Thanks to UAC, it always gives plenty of rains to Interior TN, so another active day for Tamil Nadu from  thunderstorms and also monsoon rains in ghat areas. Its rare event, lets enjoy it. And Meena is going to break a historic 200 event rainfall for July. We might never see a month like this again for centuries to come.

Monsoon winds gets activated with UAC pulling winds – Heavy rains

With UAC near Tamil Nadu this pulls the monsoon winds other side and Kerala and ghats in Valparai, Nilgiris, Theni, Kanyakumari and Nellai ghats will all get heavy rains. Particularly Idukki, Valparai, Wayanad, Thrissur, Eranakulam will all have chance of very heavy rains to extreme rains.

Meenambakkam July record for 300 mm in July – 9 mm required to cross 300 mm for 1st time in 200 years

Chennai 1818 July – 299 mm
Chennai (Meenambakkam) 2020 July – 291 mm (till 5.30 am on 29.07.2020)
Chennai (Nungambakkam) 2001 July – 270 mm
Chennai (Meenambakkam) 1954 July – 266 mm

Clouds moving from Sea into City during SWM
September 9, 2017
June 10, 2014

UAC rains in Chennai
24hrs rainfall

Sep 19, 2019 (104 mm in Nuga and 95 mm in Meena)
Sept 9, 2017
June 10, 2014 (52 mm in Meena)
Sep 09, 2013
Aug 14, 2013
Aug 20, 2010
July 29, 2007

Day rains in Chennai in last 10 years
(criteria min 10 mm should be recorded after 8.30 am)

Rainfall figures are data after 8.30 am to 11.30 am / 2.30 pm

19th July, 2020 (15 mm in Meenambakkam)
18th August, 2019 (14 mm in Nungambakkam and 27 mm in Meenambakkam)
17th August, 2019 (12 mm in Meenambakkam)
22nd July, 2019
13th August 2018
10th June, 2014
September 01, 2017
September 11, 2013
August 14, 2013 (32 mm in Nunga and 20 mm in Meena)
September 29, 2011

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