Overnight Rains Cool Chennai, More Showers Expected in North Tamil Nadu

Quick Summary:

• Chennai experienced pleasant weather on Saturday (September 20, 2025) following overnight rain.
• Thunderstorm activity was triggered by prevailing weather systems in the south Peninsular region.
• Rainfall highlights over the past 24 hours:

– Arakkonam (Ranipet) and Jaya Engineering College (Tiruvallur) recorded highest rainfall at 7 cm each.
– Ambattur, Ayapakkam, and Korattur saw 6 cm of rainfall.
– Light to moderate showers occurred in Tiruchi, Chennai, Tiruvallur, Cuddalore, Vellore, Nilgiris, Kancheepuram, Salem, Erode, and Pudukkottai districts.

• Chennai’s maximum temperature was recorded at 29°C at 11 a.m. on Saturday due to widespread thunderstorms as Friday night.
• Regional Meteorological Center forecasts similar weather for north Tamil Nadu through Sunday (September 21), with light to moderate rains predicted by Nowcast for Chengalpattu district and lighter rains in regions like Villupuram and Nilgiris until Saturday afternoon.
• A low-pressure area is likely to form over Northeast Bay of Bengal after september 25 that could impact rainfall trends.

Image Caption: Vehicles wade through stagnant water after heavy rains in Vellore on Saturday.

Indian Opinion Analysis:

The heavy rains across Tamil nadu showcase the state’s dependence on convective and southwest monsoon patterns during this season. While cooler temperatures provide relief during storms like these-for instance the drop to a pleasant maximum of only 29°C-the accompanying stagnant water poses challenges directly tied to infrastructure preparedness across urban areas such as Vellore and Chennai.

The forecast of continued thunderstorms could spell implications for travel disruptions or localized flooding if attention isn’t paid toward drainage adequacy-especially considering potential intensification linked with the low-pressure zone forming post-September 25 in Northeast Bay of Bengal. It also underscores how accurate predictions from bodies like RMC play a pivotal role in daily planning for households dependent heavily on agricultural yield sensitive/ risk worth upgrading now!.

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